[[quoteright:282:[[Film/TheWizardOfOz http://static.tvtropes.org/pmwiki/pub/images/WizOz.JPG]]]]
[[caption-width-right:282:[[PaperThinDisguise A most cunning disguise.]]]]

->'''Princess Leia:''' Aren't you a little short for a stormtrooper?\\
'''Luke:''' Huh? Oh, the uniform. ''(pulls off helmet)'' I'm Luke Skywalker. I'm here to rescue you.\\
'''Princess Leia:''' You're who?
-->-- ''Franchise/StarWars: Film/ANewHope''

Most of the heroes are trapped in a cell, when the door opens and a guard wearing a [[FacelessGoons face-concealing]] helmet enters.

They prepare for a fight. The guard takes off his/her helmet -- and reveals that it's one of their allies.

In the real world, this is illegal for a military operation (under [[http://www.icrc.org/applic/ihl/ihl.nsf/Article.xsp?action=openDocument&documentId=C5D71B78117289FBC12563CD0051DB3C Article 39]] of [[UsefulNotes/TheLawsAndCustomsOfWar Protocol I to the Geneva Conventions]]) but not when it comes to espionage (where they'll kill you anyway if you get caught) unless you take off the uniform before you start firing, and other things.

Note that the guard the hero knocks out is always wearing the right size uniform to fit them perfectly. (Except in parodies, in which case it fits them very poorly). This may or may not follow a MuggedForDisguise.

This occurs so often that Rule Number 1 on the EvilOverlordList is that the Legions of Doom should wear clear helmets. Another rule from that list calls for guards to wear tailored uniforms which will not fit any hero who attempts this trick.

It's a very common mythic trope called 'Wearing Enemy's Skin' identified by Joseph Campbell. Known examples go back to ''Literature/TheIliad'', thus OlderThanFeudalism.

In fantasy settings where some sort of magical powers are available, a common variation of this involves fully transforming TheHero into one of the enemy.

May lead to FriendOrFoe since you do, after all, look like the enemy.

See also TheMole, TrojanPrisoner, HeyWait, DeadPersonImpersonation. On a regimental scale, this is a FalseFlagOperation. When used with [[OurZombiesAreDifferent zombies]], it's PretendWereDead. When the disguised arouses suspicion by constantly insisting on his alliance to the enemy, it's MostDefinitelyNotAVillain. Contrast DisguisedHostageGambit and FalseInnocenceTrick.

[[folder: {{Anime}} and {{Manga}}]]
* ''Anime/MazingerZ'': Several times Kouji and his friends disguised as [[{{Mooks}} Iron Masks]] to infiltrate the into one operation of the enemy or one of their bases and rescuing one of their friends -usually Sayaka- or blowing the whole place up. [[PaperThinDisguise The uniforms they stole seldom fit them]], though (specially not [[{{Acrofatic}} Boss]]).
* A very odd example comes from ''Anime/SuperDimensionFortressMacross'' and its ''{{Anime/Robotech}}'' adaptation: Max is trapped onboard a Zentraedi warship and hides in a bathroom. An enemy soldier comes in and Max knocks him out and steals his uniform. The pockets come in handy for rescuing the three human prisoners. The oddity is that Max didn't disguise himself, but rather his HumongousMecha in the uniform of the equally giant alien.
* Not quite enemies, but the Lobelia Girls Academy's Zuka Club makes their first appearance in [[Manga/OuranHighSchoolHostClub Ouran Academy]] uniforms, one as a [[{{Bifauxnen}} male]].
* Jugo and Suigetsu try this in ''Manga/{{Naruto}}'' using samurai uniforms. They are caught almost immediately.
-->'''Suigetsu''': My, my... I guess you've got us.\\
'''Jugo''': [[LampshadeHanging This wasn't a very good plan.]]
* ''Manga/{{Bleach}}'': Uryuu and Orihime steal and wear some shihakusho to blend in during the Soul Society arc. Because it's Orihime and Uryuu, an awkward LingerieScene is mandatory.
* Erza Scarlet in ''Manga/FairyTail'' [[spoiler: strips her Edoras counterpart in order to pose as her. Funny how Erza has no problems with stripping her counterpart naked (well at least partially naked)]].
* The group infiltrating Baba Yaga castle in ''Manga/SoulEater'' dress in the same way as the Artifact Soldiers with long black robes and white masks. Causes a Crowning Moment of Awesome/Funny when Kirikou decides to reveal himself after wandering around for a while: "Surprise."
* During the ''Manga/OnePiece'' G8 Filler Arc, the Straw Hats are forced to do this. They are quickly picked out as fakes when the commander gets reports of suspicious unknown Marines wandering around the base.
* In ''[[Anime/MobileSuitGundam0080WarInThePocket Gundam 0080]]'', [[TheAlcoholic Misha]] draws the Federation's attention with the [[HumongousMecha Kämpfer]] while the rest of the Cyclops Team infiltrates the base to destroy the [[SuperPrototype Gundam NT-1]]. Unlike many examples, the uniforms fit perfectly because they were obtained in advance; what gives them away is [[NewMeat Bernie]] [[ArtisticLicenseGeography failing geography forever]].
** Bernie says that he is from Australia and says at Christmas time the city was covered in snow-this is possibly understandable as he is a Zeon and may not know much about Earth since he living in a colony.
** Heero Yuy in ''Anime/MobileSuitGundamWing'' is seen infiltrating enemy facilities almost every other episode. He's incredibly brazen about simply knocking out guards and taking their uniforms (which somehow always fit him) and then waltzes right into the enemy base without a second thought. Trowa also does this once. Rather justified since they are trained operatives and probably were taught to do this sort of thing for their missions.
** In ''Anime/MobileSuitGundam0083StardustMemory'', Anavel Gato accomplishes the [[GrandTheftPrototype hijacking]] of the first episode by walking into the hanger while wearing a Federation uniform provided by a confederate. He complains that the uniform's rank pins are too low.
* Done in ''Anime/HeartCatchPrettyCure'' with Erika, Itsuki, Coffret and Potpourri dressing up as [[{{Mooks}} Snackies]] to sneak into the Desert Apostles' base.
* Germany and Prussia from Manga/AxisPowersHetalia dress as American soldiers at one point in order to infiltrate their camp and spy on them.
* ''Franchise/LupinIII'': Lupin is a MasterOfDisguise, so he engages in this often. His favorite disguise is apparently Zenigata.
** There was one episode of the second TV series where Lupin, Jigen, and Goemon ALL dressed up as Zenigata.
** Anyone in the cast might be expected to appear as a disguised version of someone else. Zenigata has even disguised himself as Lupin!

[[folder: Audio Drama]]
* In the AudioPlay/BigFinishDoctorWho story "[[Recap/BigFinishDoctorWhoNEDAS3E3TheBeastOfOrlok The Beast of Orlok]]", the Doctor's companion Lucie does this without meaning to; after getting CoveredInMud during her escape from the castle, she's then mistaken for a Golem warrior.

[[folder:Comic Books]]
* Mary-Maria tries this in ''ComicBook/ArcherAndArmstrong'' to sneak into Area 51. The costume fits fine, but she's still caught almost immediately, possibly because she has a hard time concealing her surprise when she runs into an alien.
* Played semi-straight in multiple ''ComicBook/{{Asterix}}'' stories. At Obelix's insistence, they always look for two enemies, one small and one... medium-sized. Note that Obelix is a big man by any standard imaginable, in case you didn't know.
* In an "alternate future" storyline in Franchise/{{J|usticeLeagueOfAmerica}}LA, Franchise/{{Batman}} spent years posing as Desaad, right under ComicBook/{{Darkseid}}'s nose.
* In one of ComicBook/MortadeloYFilemon's comics, ''El Sulfato Atómico'', Filemón is imprisoned and Mortadelo decides to dress as a commander of the Tiranian Army (Tirania is the country they are infiltrating), but when it comes to give the orders, [[OhCrap he realises he doesn't know how to speak Tiranian]].
* An extreme example happened in ''ComicBook/SinCity''. Dwight [=McCarthy=] had previously been shot in the face, requiring surgery. This ended up changing his appearance drastically. The BigBad, meanwhile, was planning to see a drug courier. Dwight had the courier killed and took his place in order to infiltrate the villain's estate. Since he was essentially disguised after his surgery, this allowed him easy access to the villain's mansion.
* ''ComicBook/LeScorpion'': Done twice ''The Angel's Shadow''. First Armando disguises himself as a warrior monk as part of a TrojanPrisoner gambit to gain access to the Vatican dungeons. later, he and Hussar disguise themselves as Warrior Monks to steal a shipment of gold.
* Since Mandalorians are always wearing their heavily customized armor and rarely taking of their helmets in public, it's very easy for Zayne Carrick to impersonate the evil scientist Demagol to free all of Demagol's prisoners in ''Comicbook/KnightsOfTheOldRepublic''. And in a much more shocking case [[spoiler:only minutes later, Demagol manages to overpower Rohlan while being put back into his armor for transport, and then drugs him up enough to be in a coma for half a year, during which he impersonates Rohlan]].
* Subverted in ''Street Angel''; the eponymous heroine is some 12 years old, 5'1", 95 lbs. She knocks out a ninja and wears his costume to impersonate him and get information from his cohorts. After they blindly feed her the info she was after, the ninja she assaulted wakes up and exposes the charade. Only it turns out they weren't fooled by the prepubescent girl impersonating a grown man -- they actually knew it was the Street Angel specifically and just didn't want her to beat them up.
* Knuckles does this in ''ComicBook/SonicTheHedgehog'' with the Dark Leigion's uniforms in order to infiltrate them. He takes the time to lampshade that its fortunate most echidnas are the same size and build, otherwise he probably wouldn't be able to pull it off. Oddly, in the same issue, it still works when the rest of the Chaotix do the same, despite the fact that Vector is at least a foot and a half taller than the rest, (and the hood shouldn't cover his snout, or Espio's facial horn), and Charmy is much shorter than the rest.
* ComicBook/{{Catwoman}} disguises herself as a Regime mook in Year Two of ''ComicBook/InjusticeGodsAmongUs'' and uses the opportunity to incapacitate the Flash.
* ''ComicBook/JonahHex'': In #10 of the original series, el Papagayo and his men ambush a squad of Mexican soldiers and steal their uniforms to infiltrate the fort at Veracruz and steal the gold stored there.

[[folder:Films -- Animated]]
* Spoofed in ''WesternAnimation/MonstersVsAliens''. Link, BOB, and Dr. Cockroach are all mistaken for cloned mooks [[PaperThinDisguise just by wearing the same shirt they do]]. At one point a cloned mook sees through one of their disguises...only to order the other two to incinerate him.
* ''WesternAnimation/TheSimpsonsMovie''. Homer dresses as a hotel doorman to fool a soldier that he is a superior officer. He's only given away when the soldier queries why an order from the President is written on a leaf.
* Spoofed in ''WesternAnimation/RecessSchoolsOut'' where T.J and Principle Prickle disguise themselves as {{Mooks}} in order to get into the {{Big Bad}}'s lab. Unfortunately, [[RealityEnsues the guard can plainly see that they're not mooks and they're forced to run]].

[[folder:Films -- Live-Action]]
* ''Film/TheArrival''. While snooping around the alien ElaborateUndergroundBase, Zane Zaminsky is about to be discovered by guards so he takes the risk of stepping into the device they use to disguise themselves as humans. It creates a whole new body for him that gets him past the guards, but unfortunately Zane doesn't speak the aliens language, so when one tries to speak to him a short time later he has to fight his way out.
* Part of the Chinese film ''Film/{{Assembly}}'' takes place during UsefulNotes/TheKoreanWar. The Chinese characters dress in South Korean uniforms for a scouting mission. They encounter an American tank, and the tank commander asks them for directions. The Chinese-dressed-as-Koreans reply with what the subtitles calls "Korean sounding gibberish," and it all ends peacefully. An earlier scene takes place during the Chinese civil war: Communist soldiers steal helmets and boots from better-equipped Nationalist prisoners. This causes confusion later.
* Parodied in ''Film/AustinPowersInternationalManOfMystery''. Miss Kensington and Austin follow a pair of Virtucom employees into the restrooms, one a very tall and lanky man, the other an obese woman, and emerge seconds later in perfectly fitted uniforms.
** And spotted in the five seconds between leaving the restrooms and entering the employee's only area.
* ''Film/TheAvengers1998''. Mrs. Peel may have done this with a copy of her clone's SpyCatsuit to infiltrate Sir August's base.
* In ''Film/BattleOfTheBulge'', German soldiers dress as Americans to infiltrate and confuse American attacks. TruthInTelevision, but the effect was mostly psychological, as the actual operation was a failure.
* ''Film/BestSeller''. The VillainProtagonist asks the name of a guard before he kills him, then uses the name to get another guard to open the door.
* ''Film/BillAndTedsBogusJourney'' has the title pair do this to get into FluffyCloudHeaven. Yes, they mugged two guys in ''Heaven''.
* ''Film/BlazingSaddles''. Two Ku Klux Klan members are part of the line of applicants to join Hedley Lamaar's army of {{Mooks}}. Sheriff Bart and the Waco Kid lure them away, knock them out and steal their robes. Unfortunately, they forget that Sheriff Bart is black...
* ''Film/BlueStreak'', has the main character posing as a cop in order to retrieve a diamond he left in a police building. It grows on him. So much that, when he's forced to pretend to be a different criminal, the bad guy claims that he "smells like a cop".
* In ''Film/BrainDonors'', AmbulanceChaser Roland T. Flakfizer and his cohorts dress up as doctors to infiltrate a hospital and recover an incriminating letter.
-->'''Rocco:''' "We'll have to perform a full rectum-ology."
-->'''Roland:''' "Fondue, an epidemic! drop those pants... Not you, the patient."
-->'''Doctor:''' "I thought you were cardiologists..."
-->'''Rocco:''' "Uh, well, they're all connected, we enter the rectum and head north."
-->'''Roland:''' "Why do you think we have such long instruments?"
* Twice in ''Film/{{Braveheart}}'':
** First William dresses as an English soldier to help his wife get out of town. His efforts are to no avail.
** Later Wallace and his allies infiltrate an English fort by disguising themselves as English soldiers.
-->'''English Commander:''' I have dispatched 100 soldiers to Lanark! They will be returning ''now''!
-->'''Wallace:''' What, were they dressed like this? Actually, it was more like 50.
* In ''Film/CaptainAmericaTheWinterSoldier'', the heroes are busted out of a prisoner transport by an ally in enemy uniform--aided by the fact that said uniform includes exactly the type of face-concealing helmet the Evil Overlord List recommends against…
* ''Film/TheChroniclesOfRiddick'': Riddick disguises himself [[spoiler:as a stormtrooper to get inside the Lord Marshal's ship]]. Subverted, though. [[spoiler:Dame Vaako, one of the only Necromongers who actually knew what he looked like, still recognized him--she just decided to let him have his shot. He also had to kill a couple guards who caught onto him.]]
* ''Film/ConanTheBarbarian1982''. Conan knocks out a member of the Doom Cult to infiltrate Thulsa Doom's lair. It doesn't work however, as Conan gave a stolen amulet to a guard to establish his bona fides. Suspicious, the guard takes it to his boss, and they easily locate Conan among the thousands of cult members simply because he's moving and acting differently from the fervent cultists.
* Ends disastrously in ''Film/CrossOfIron''. German soldiers are isolated from their unit and must wear Soviet uniforms to sneak back to their base. The German guard commander knows about the deception, but has a personal grudge against the returning sergeant, and orders his men to shoot the approaching "Russians".
* Inverted in two different ways in ''Film/TheDarkKnight''. First when [[spoiler:the Joker's gang try to kill the mayor by taking the place of Police Officers in a parade]], and then when [[spoiler:they put ''their'' masks on ''civilians'' who have their mouths taped shut and their hands taped to the fake/unloaded guns]]. The Joker acquires a [[spoiler: nurse's uniform when he goes to pay a visit to Harvey Dent]].
* ''Film/TheDirtyDozen''
** The Dozen won a war game by using this trope. Since the two sides only differentiated by colour of arm-band, it was surprisingly easy ("We're traitors"), although they did their best to ensure that the members of the team that the opposing colonel had gotten a close look at weren't part of the infiltration stage.
** The Dozen dressed as German soldiers for their actual mission in occupied France.
* At one point in ''Film/DrStrangelove'', a column of US Army troops is dispatched to storm the Air Force base which has been commandeered by renegade general Ripper. The base troops think they are battling invading Russians:
-->""You sure gotta hand it to those Commies. Gee, those trucks sure look like the real thing, don't they? I wonder where they got 'em from?"
-->"Probably bought them from the Army as war surplus. OK. Open up at 200 yards.."
* ''Film/TheEagleHasLanded'' points out the illegality of this several times. There is a flimsy rationalisation where they wear their German paratrooper uniforms '''underneath''' Polish uniforms, and only engage in actual combat as Germans.
* In ''Film/AFistfulOfDollars'', The Rojos gang disguise themselves as US soldiers to stage an ambush on the Mexican troops.
* ''Film/ForceTenFromNavarone'': The main characters are all either spies or guerilla fighters operating in occupied territory, so you betcha:
** Barnsby and Mallory kill two Chetnik soldiers who were tracking them, but are later informed that they were actually Partisan spies who had infiltrated the Chetnik camp. Whoops.
** Force Ten uses the same tactic with dressing two Partisan soldiers as Chetniks when they raid their base later on to retrieve several prisoners.
** And again when they infiltrate a German base to steal the explosives they need to blow up the dam, they pose as Wehrmacht soldiers.
* In ''Film/GIJoeRetaliation'' [[spoiler:Storm Shadow pretends to be Snake Eyes so that he can break into the German facility and free Cobra Commander]]. Also Jinx [[spoiler: disguises herself as a Cobra red ninja to get close to the Cobra Commander, Firefly and Zartan along with Storm Shadow, who was going after Zartan because he murdered the Hard Master]].
* In ''Film/TheGumballRally'', one of the entries into the race is a Dodge police cruiser with black and white paint job, and magnetic door decals for police and highway patrol logos of every state they would be crossing through.
* ''Film/TheGunsOfNavarone''. After turning the tables on and capturing their German Army interrogators, our heroes don their uniforms and escape.
* ''Franchise/IndianaJones'':
** DoubleSubversion in ''Film/RaidersOfTheLostArk''. Indy first [[MuggedForDisguise beats up a scrawny Nazi guard and tries to put on his uniform]], except the uniform's too small for him. Luckily, he gets discovered by a much larger German officer who mistakes him for a guard, and Indy is able to knock him out and steal ''his'' uniform while the officer is [[HeyWait busy berating him]]. It fits like a glove.
** ''Film/IndianaJonesAndTheLastCrusade''
*** Indiana knocked out a Nazi officer at a book burning rally, leading to a too-close encounter with Der Führer himself.
*** Indiana knocked out a waiter on a zeppelin and took his place.
** Inverted in ''Kingdom of the Crystal Skull'', where the American army convoy at the start of the movie are Russians.
* ''Film/JamesBond''
** ''Film/DiamondsAreForever''. Bond [[MuggedForDisguise takes out one of Blofeld's doctors and steals his clothing]] so he can infiltrate an operation room.
** ''Film/DrNo''. Bond knocks out one of Dr. No's workers and steals his radiation suit so he can infiltrate the nuclear reactor room.
** ''Film/{{Goldfinger}}''. The title villain dresses as a U.S. Army general during the assault on Fort Knox.
** ''Film/{{Moonraker}}''. While in Drax's ElaborateUndergroundBase, Bond and Dr. Goodhead knock out two of Drax's employees and put on their yellow jumpsuits so they can masquerade as astronauts and board one of the space shuttles.
** In ''Film/{{Thunderball}}'' Bond steals a black wetsuit and hood to masquerade as a SPECTRE diver.
** ''Film/YouOnlyLiveTwice''. While in the SPECTRE base, Bond and two escaped cosmonauts dress in white security uniforms so they can take the place of the SPECTRE astronauts.
* ''Film/JudgeDredd''. While Dredd is on the run from the law, he knocks out a Judge and steals his uniform. It fits perfectly.
* ''Film/TheLeagueOfExtraordinaryGentlemen''. Secret Service agent Sawyer performs a MuggedForDisguise on one of the Fantom's {{mooks}} and then joins them. He later saves the League from being slaughtered by the {{mook|s}}'s gunfire by shooting most of them.
* ''Film/MomAndDadSaveTheWorld'': A sympathetic mook actually gives the hero his uniform to aid his escape. As the uniform ''doesn't'' conceal his face, this doesn't work.
* Used in ''Film/OBrotherWhereArtThou'' to rescue Tommy from TheKlan, but it doesn't work super well.
* ''Film/OurManFlint''. While infiltrating Galaxy Island Flint takes out two Galaxy personnel and dons their clothes: one an ordinary worker and the other a security guard.
* ''Film/ThePianist'' has an unintentional example: [[spoiler: Before fleeing from the Russian advance, Captain Hosenfeld gives the freezing Szpilman his coat. Unfortunately, several Russian soldiers mistake him for being a German soldier, and he is nearly shot]].
* In ''Film/{{Posse}}'', Jesse poses as a Ku Klux Klan member to rescue Papa Joe and Obobo.
* The same trick was used in ''Film/PrivateBenjamin'', using one soldier's non-regulation red underwear to make the red armbands.
* In ''Film/{{Sahara 2005}}'', a straight version of this allows the protagonists entry to the mooks' base, especially since they've "borrowed" the BigBad's car.
* ''Film/SamsonVsTheVampireWomen'' features a mook trying to disguise himself as a wrestler that the titular hero is about to fight -- only the mook has a substantially different body shape from that of the wrestler. This fact is painfully obvious since the wrestler -- and the mook who takes over for him -- wears nothing but tights and a mask.
* Similar to ''WesternAnimation/TheSimpsons'' examples below, in ''Film/ScaryMovie4'' the would-be clothes stealers are themselves beaten up and have to settle for garments on a clothesline instead.
* ''Film/{{Serenity}}'': It was said about Reavers that they skinned people alive, raped them repeatedly, ate their flesh and ''then'' murdered them. They kept the skins as [[CreepySouvenir trophies]], their spaceships were covered with blood, and they even tied whole corpses to the front of their ships. Knowing this, Mal employed it in the BigDamnMovie, using his murdered ''friends'' as disguise. The late Shepherd Book had the "honour" of being the centre on Serenity's nose. It worked, as they went through the Reavers' territory and back, and survived.
* In ''Film''SevenSamurai'', Kikuchiyo steals the armor of a dead bandit to try and steal a musket from the group.
* ''Film/TheSilenceOfTheLambs'': Hannibal Lecter employs this trope in the most gruesome manner possible.
-->"Ready when you are, Sergeant Pembrey..."
* Parodied in ''Film/{{Spaceballs}}''. Lone Starr and Barf lure two Spaceballs into their Winnebago, beat the crap out of them, and come out with their uniforms. Barf's is perfectly fitted, even though he's much larger than either of the soldiers...and has a tail... And then when they make their escape, the same two guys are in their underwear...and have Spaceball helmets on, even though [[MST3KMantra Lone Starr and Barf also stole their]] ''[[MST3KMantra helmets]]''.
* The chunkheaded hero from ''Film/SpaceMutiny'' beats up a guard who's easily thirty kilograms and 25 cm smaller than he, yet his stolen uniform fits perfectly. And within minutes, the disguise is blown at the ''first'' checkpoint he comes to. A [[StealthParody subversion]], perhaps?
** Mocked in the MSTing of ''Film/SpaceMutiny'' when the beefy hero knocks out a smaller man in a tight-fitting uniform and then changes into it.
* ''Franchise/StarWars'':
** ''Film/ANewHope'' gives us the situation seen in the page quote, where Luke and Han mug some stormtroopers to sneak around the Death Star to rescue Princess Leia.
** ''Film/ReturnOfTheJedi'': Boussh, the bounty hunter who sells Chewbacca to Jabba the Hutt turns out to be Princess Leia in disguise, there to rescue Han. Also, Lando is one of the guards, having clearly just walked up and gotten himself hired.
* Done by Murray and Ramis in ''Film/{{Stripes}}''.
* ''Film/TeenageMutantNinjaTurtlesIII'' has the turtles do this with a justification. The established rules of time-travel in the movie state that in order to go into the past, the turtles would have to swap places- and uniforms- with whoever is holding the scepter in feudal Japan. It just so happened that the ones in the past were the Daimyo's honor guard. Luckily, the ceremonial samurai masks allow the Turtles to disguise their faces as well.
* Subverted in the Swedish film ''The Third Wave''. A hitman who's stalking his target through an anti-globilisation riot kills a riot policeman and steals his gun, uniform and face-concealing helmet. This enables the hitman to get close to the protagonist and execute him with a shot to the head -- unfortunately it turns out the gun he stole is [[OhCrap loaded with plastic bullets]].
* The AntiHero in ''Film/ThisGunForHire'' enters Nitro Chemical's building on the day that they are conveniently having a gas attack drill. He fights a {{Mook|s}}, takes the mook's uniform and gas mask, and gains entrance to the bad guy's office.
* In ''Film/ToBeOrNotToBe'', the lead and his comrades do this all the movie.
* Kevin Flynn pulls this off in ''Film/{{Tron}}'', but because the good guys and the bad are simply [[ColourCodedForYourConvenience color-coded]], all he needs to do for a disguise is steal the [[TronLines glowing red trim]].
* ''Film/TropicThunder'': "Here's my mothafuckin' farm!"
* A villainous example from ''Film/TheUntouchables'' with Frank Nitti, who briefly dresses up as a police officer to infiltrate the police department and assassinate one of the Treasury Department agents and their informant, along with two police officers who were waiting outside.
* A similar inversion occurs in ''Film/VForVendetta'', when V [[spoiler: dresses up bound and gagged employees of the station he's attacking in replicas of his own costume, leading the guards to unwittingly open fire on them]].
* In ''Film/WhereEaglesDare'', Richard Burton's team of commandos don Nazi uniforms to infiltrate an enemy castle, purely to get Creator/ClintEastwood running around shooting people in German stormtrooper garb. In a twist, some of the commandos are undercover Nazis, their true allegiances reflected in what they're wearing.
* ''Film/{{Windtalkers}}'': Ben comes up with a way to take out an entrenched Japanese unit through infiltration by putting on a Japanese uniform himself and making his superior Joe look like a captured enemy. The subterfuge is made possible on account of Ben's tanner skin color as a Navajo native, which Joe had earlier noted might cause others in the field to mistake him for a Japanese soldier.
* ''Film/TheWizardOfOz''. Scarecrow, the Tin Woodman, and the Cowardly Lion are ambushed by three of the Wicked Witch of the West's Winkie castle guards. In the next scene, the heroes sneak into the witch's castle dressed in the guards' uniforms, providing the page picture.
* ''Film/XMenFilmSeries'':
** ''Film/XMenFirstClass'': Agent [=Moira MacTaggert=] does a variation when she has to sneak into a strip club. In this case, it's "undressing" like the enemy... much to her partner's surprise.
** ''Film/XMenDaysOfFuturePast'': Quicksilver dons the uniform (which conveniently fits him perfectly) of a Pentagon guard that he has BoundAndGagged so that he can reach Magneto's prison cell.
* The Allied {{SociopathicSoldier}}s in ''Film/PlayDirty'' infiltrate German territory by using Italian and German uniforms. This backfires in the end when the British Army unexpectedly invades the city and guns them down in the streets.

* ''Literature/LoneWolf''
** In Book 12, ''The Masters of Darkness'', Lone Wolf is infiltrating the Darklands while disguised as a Drakkar and (later) Darklord Ghanesh's servant thanks to the help of a TurnCoat in the enemy ranks.
** There are also multiple possible cases of MuggedForDisguise in the series.

* The Baudelaires from ''Literature/ASeriesOfUnfortunateEvents'' unintentionally do this in ''The Hostile Hospital'' when they disguise themselves as doctors and are mistaken by Olaf's associates for the two powder-faced women who are also disguised as doctors.
* Even Myth/KingArthur makes use of this trope, with tragic results: The brothers Balin and Balan go their separate ways, have adventures, defeat their enemies, [[RandomDrop plunder the bodies]], and put on the better armor. By the time they meet again, their armor and shields make them unrecognizable to each other. [[CainAndAbel Tragedy ensues]].
* Similarly, in Creator/{{Homer}}'s ''Literature/TheIliad'', following the siege of Troy, the Trojans took the armor off dead Greek warriors and put them on in an inevitable resistance. Any poor Greek who thought he was joining his allies was racing towards his own death.
** In ''Literature/TheAeneid'', the tactic is shown from the Trojan's viewpoint; it succeeds for a while, but the Greeks figure out their ploy, and the Trojan archers have no idea that the band of soldiers is made of their allies, so Aeneas loses a few men to the Greeks and to friendly fire.
* In Victor Hugo's ''Literature/LesMiserables'' French National Guard uniforms are worn by several [[spoiler:revolutionaries and a jealous adoptive father]] to pass through National Guard lines into the barricades.
* In Creator/TerryPratchett's ''Literature/{{Discworld}}'' novel ''Discworld/{{Jingo}}'', after being dragooned into spying on the Klatchians with Lord Vetinari, Fred and Nobby attempt to steal some Klatchian clothing in order to blend in. Unfortunately, since it's dark out they only end up beating ''each other'' up, and the men they lured into the alley rob "them" instead.
** Nobby was never on the losing side of a battle when he was a quartermaster, the reason being that he'd sneak off and change into a stolen enemy uniform the moment his lot started losing. Due to his habit of selling all his army's weapons and armor (often to the enemy) this happened frequently: enough that experienced generals kept an eye on what he was wearing to see how the battle was going.
* In ''Literature/OpenSesame'' by Tom Holt, two main characters prepare to jump on a pair of guards, realise the outfits wouldn't fit, so give the guards their measurements. The guards, who are bound to [[TheoryOfNarrativeCausality narrative rules]], walk off and send in two more guards, who are promptly knocked unconscious, letting the main characters steal their perfectly fitting costumes.
* Used in the Myth/RobinHood ballad where he faces Guy of Gisbourne, wherein after killing Gisbourne, Robin fakes his death by switching clothes with Gisbourne's corpse and mutilating the corpse's face so it's unrecognizable. There are also occasions on which Robin or his men dressed as the enemy without needing to employ fatal measures. Done twice in the 1973 Disney ''Disney/RobinHood'' cartoon. Robin disguises himself as one of the sheriff's vulture guards, and Little John as the sheriff himself.
* Happens a few times in Marcus Pitcaithly's ''Literature/TheHerewardTrilogy''.
* Done in Creator/CSLewis's final ''[[Literature/TheChroniclesOfNarnia Chronicles of Narnia]]'' book, ''Literature/TheLastBattle''. Since the enemies are thinly disguised Arabs, the deception includes wearing blackface. One wonders how the upcoming film adaptation in going to handle this in these more PC times.
** There is a very clear difference between blackface and using makeup and other chemicals to darken ones skin for espionage purposes.
* ''Literature/HoratioHornblower'' uses this once or twice:
** A few times he flies the enemy flag on approach before whipping it down and running up the Union Jack before opening fire. [[FalseFlagOperation Not an uncommon tactic in naval warfare of the time]] but to be legal, the correct ensign had to be flying prior to commencement of active hostilities. Napoleon later uses this to trump up capital charges against him, even though Hornblower had observed the correct form.
** He ''does'' wear an enemy uniform to escape France with Bush and Brown; his French hosts whip up three merchant marine uniforms for them to wear, and since Hornblower already knows French (and Brown becomes fluent in their extended stay), they pass easily.
* Literature/JudgeDee and his lieutenants are constantly disguising themselves as assorted members of the underworld. Tao Gan actually IS a member of the underworld, retired.
* Done at least three times in the ''Literature/{{Redwall}}'' series: Brome of Noonvale dresses up as a searat, Jukka Sling (a squirrel) shaves her tail and dyes her fur to pass as a Blue Horde rat, and Midge Manycoats designs elaborate vermin costumes for himself and Tammo. On one other occasion, Mariel and friends are wearing stolen searat clothes while on board a ship, are seen by a helmsrat on another ship, and he mistakes them for other searats even though they weren't expecting other rats to be around and aren't actively pretending to be such.
* In Robin Jarvis' ''The Oaken Throne'', a prequel to his ''Literature/DeptfordMice'' trilogy, Ysabelle dons the costume (made of red silk and sewn as a ghastly representation of a flayed corpse) worn by the high priest of Hobb to direct his minions to leave and so not pursue she and her friends.
* In Creator/JRRTolkien's ''Literature/TheLordOfTheRings'', Frodo and Sam disguise themselves as orcs during the last leg of their journey. And no, it doesn't fit either of them right. Good thing it's dark. It also helps that the armor the orcs are wearing is rather mix-and-match to start with, so while the ill-fitting armor may be noticed, it's not an immediate giveaway.
** Used in ''Literature/TheSilmarillion'' as well, when Beren, Finrod, and his soldiers disguise themselves as Orcs. [[spoiler:It doesn't work.]]
*** And later in the same story when Lúthien disguises herself as a bat and Beren as a werewolf to infiltrate Morgoth's citadel, [[spoiler:this one does work.]]
* In Creator/SandyMitchell's Literature/CiaphasCain novel ''Death Or Glory'', Cain and his group travel in stolen ork vehicles. This does distract the orks, but when they come into firing range of an Imperial force, they nearly get fired on before they manage vox communication, and the force demands proof.
** In Creator/GrahamMcNeill's TabletopGame/{{Warhammer 40000}} Literature/{{Ultramarines}} novel ''Nightbringer'', an eldar {{Pirate}} approaches an Imperial vessel broadcasting that it was the ''Gallant'', an Imperial ship. [[spoiler:Unfortunately for him, someone onboard knew that particular ship had been destroyed five years earlier.]]
** In Creator/JamesSwallow's TabletopGame/{{Warhammer 40000}} Literature/BloodAngels novel ''Deus Encarmine'', Blood Angels steal a tank and use it to mask their approach to the Word Bearers camp.
** In ''Literature/SpaceMarineBattles'', Lysander hides from the Iron Warriors looking through their entire fortress for him by putting on the rags of mutants inhabiting Kulgarde's underground and keeping to the shadows, where his Space Marine bulk isn't as noticeable.
* Subverted in "The Wonderful Story of Henry Sugar" by Roald Dahl. The titular main character has found a way to beat the casinos, but he gets cocky one night and the owners send goons to his hotel. The bellboy comes to warn him (not out of altruism, but in the belief that it doesn't hurt to have the gratitude of a man who just won a stack of money) and offers to pretend that Henry overwhelmed him and stole his uniform to sneak out of the hotel.
* The Wraiths of the ''Franchise/StarWars: Literature/XWingSeries'' have reason to do this a few times - dressing as SpacePirates in some situations, stormtroopers in others. As pirates they need no ID, but they run into some trouble as stormtroopers without the proper passwords.
* ''[[Literature/{{Conqueror}} Bones of the Hills]]'' opens with a group of Mongols under Tsubodai engaging a regiment of Russian knights. Jochi's argan manages to kill a detachment of them, then steal their armour in order to attack the main force.
* When the ''Literature/{{Animorphs}}'' dress as the enemy, the clothes ''always'' fit...[[JustifiedTrope because they've morphed into whoever they're trying to imitate]].
* In ''Pendragon: The Merchant of Death'', Loor and Press dress as Bedoowan knights.
* ''Literature/TheBelgariad'' has a city filled with [[ReligionOfEvil Grolim priests]], conveniently wearing identical [[BlackCloak black cloaks]] and [[MalevolentMaskedMen steel masks]] to hide their appearances. The good guys... obtain... a few, helping them get around the city despite the bloody stab holes in their new clothes.
* Kavi and Jiaan do this to infiltrate a palace under the control of the Hrum in the third book in Creator/HilariBell's ''Literature/FarsalaTrilogy''.
* Played with during one sequence in the ''Literature/BelisariusSeries'', the title character has to escape from a city full of bad guys out for his blood. He needs a uniform to escape, but with the thousands of guards looking for him, he has difficulty finding a uniform that's both the right size, the right type, and being worn by a guard he can take out quietly. Several times he pulls a BavarianFireDrill on guards he runs into to get them to search someplace else. Eventually he finds the uniform, and makes it out of the city.
* Done a couple of times in Literature/HarryPotter, aided by Polyjuice Potion:
** In ''[[Literature/HarryPotterAndTheChamberOfSecrets Chamber of Secrets]]'', Harry and Ron disguise themselves as Malfoy's best friends Crabbe and Goyle to question him about the Chamber.
** In ''[[Literature/HarryPotterAndTheDeathlyHallows Deathly Hallows]]'', [[TrueCompanions the Trio]] Polyjuice themselves into three random Ministry employees to sneak into the Ministry of Magic. It works, but it's subverted in that the "random" part causes endless problems: Hermione and Ron are stuck in the jobs of their disguises not to blow their cover, and they have to bluff their way though; Ron's is man whose wife was on trial that same day. Luckily Harry realized quickly his disguise was a Death Eater. As all hell breaks loose he just starts giving orders and threatening people who try to stop them, getting a bunch of Muggleborns out through the front door. [[spoiler: Then the real guys, they didn't knock out, return.]]
** And again when Hermione and Ron pretend to be Bellatrix and some Death Eater-friendly foreigner to [[spoiler: break into Bellatrix's Gringotts vault]]. Subverted again when [[spoiler: the Goblins had been warned that someone may try to enter the vault, and Hermione having Bellatrix's wand blows her cover instead of helping it]].
** This was the essence of [[spoiler:Fake!Moody]]'s plan in ''[[Literature/HarryPotterAndTheGobletOfFire Goblet of Fire]]'', but done to [[InvertedTrope get into Hogwarts]].
* In David Eddings' ''Literature/TheTamuli'' series, some of the heroes disguise themselves as mercenaries (complete with different faces) to get into [[TheDragon Scarpa's]] army.
* ''Magazine/{{MAD}} Super Special Fall 1980''. In ''The Moronic Woman'' (a ''Series/TheBionicWoman parody''), Jammy Summons (Jaime Sommers) and Oscular (Oscar Goldman) have infiltrated the enemy palace. In order to get a guard's uniform for Oscar to wear, Jammy walks around knocking out guards until they find one who is Oscular's size. Oscular puts on the uniform and they go to the office of the dictator.
* Inverted in the Literature/PaladinOfShadows book ''A Deeper Blue'', where mooks disguise as a friendly tactical team and later DEA agents.
* A common tactic of Company C in the UsefulNotes/TheAmericanCivilWar novels of Creator/JTEdson. Sometimes it was not even necessary to dress in enemy uniforms as the only difference between the Federal and Confederate uniforms was the colour, so in near darkness it was quite easy to pass yourself off as a member of the opposing side.
* Played with in [[Literature/TheGoodSoldierSvejk The Adventures of Good Soldier Švejk]] - the main protagonist is [[FriendOrFoe taken prisoner]] by the Austrian Army when wearing Russian Army uniform ([[ItMakesSenseInContext he was trying if he looked well in it and whether the Russian uniform was "warm and comfortable"]]) and mistaken first for a runaway Russian prisoner of war, and then, for a [[TurnCoat soldier of the Czechoslovak legion fighting against Austria-Hungary]]. Chiefly played for laughs, until he's [[BlackComedy sentenced to death]] (his confession that he [[MathematiciansAnswer put on the Russian uniform voluntarily and from his own free will]], certainly did not help him). He got [[KarmaHoudini better]] though - as there is belatedly realised that there was no way for him to defect to Russians hundred miles behind the front lines.
* In the ''[[Franchise/StarTrekExpandedUniverse Star Trek]]: [[Series/StarTrekTheNextGeneration The Next Generation]]'' novel ''Dark Mirror''[[note]]written before [[Series/StarTrekDeepSpaceNine [=DS9=]]] showed its version of the 24th century Mirror Universe[[/note]], Picard, Troi, and La Forge have to disguise themselves as their mirror-universe counterparts to infiltrate the I.S.S. ''Enterprise''-D to find out why their own ship was brought to the MirrorUniverse.
* ''Literature/{{Wasp}}'': To break an ally out of jail, Mowry and a number of hired goons dress themselves as Military Intelligence and the StateSec, and arrive to the prison to request him for interrogation. It almost works, except just as they are leaving, the real StateSec agents happen to arrive, who immediately realize something's not right.
* ''KG 200'' by J.D. Gilman and John Clive is about a Luftwaffe unit that specializes in flying captured Allied aircraft (the unit actually existed, but used them for long-range reconnaissance and dropping enemy agents). In the novel however the intention is to use American aircraft to bomb London, to sow discord between the US and British forces.
* A half-comical example occurs in Creator/JamesFenimoreCooper's ''Literature/TheLastOfTheMohicans'', where it entails actually wearing the enemy's bear skin (dressing up in a Huron medicine man's bear costume).
* ''Literature/JourneyToChaos'': When infiltrating the lair of the Black Cloaks, Eric knocks out a couple of them and steals their cloaks in order to pretend to be one of them. It still takes some quick thinking to sell the disguise, and if they weren't in a hurry, they might have paid more attention.
* Shows up twice in ''Literature/{{Noob}}'':
** The first novel, during which the guild is investigating a group of people wearing a BlackCloak, has the Noob guild kill members of the group so the can steal their cloaks and sneak into one of their meet-ups.
** The third has them disguised as Colation players [[MediumAwareness by changing the colors of the cursors indicating their faction in the game interface]].
* ''Literature/{{Swellhead}}''. [[FairCop Stacy Cotterill]] finds a locker room full of mook jumpsuits, so she's able to pick one that fits her. Things are going fine until the GenreSavvy supervillain orders his FacelessGoons to take their helmets off. Needless to say the beautiful heroine stands out among all the male mooks.

[[folder:Live Action TV]]
* In ''Series/BabylonFive'' the attempt to free Sheridan on Mars is blown when one of the infiltrators is seen to have fresh blood on his uniform (leaking from a bandaged stab wound obtained previously).
* Appropriately this comes up in the second PaintballEpisode in ''Series/{{Community}}''. TheOneWith the [[Franchise/StarWars Stormtrooper-esque]] bad guys.
* ''Series/DoctorWho'':
** In at least four stories, the Doctor and his allies manage to disable a Dalek, remove the mutant inside, and substitute one of their number. How a whole person fits in there, when the mutant that came out is not much bigger than a human head, is never made clear. Because in the Whoniverse everything's BiggerOnTheInside?
** At other times, people have fooled Daleks by dressing up as Robomen or Dalek troopers. In the former case, the deception was falling apart, but was saved when the Dalek were distracted by an attack by people without disguises. In the latter, the deception worked until they were seen in the self destruct chamber.
** Done in [[Recap/DoctorWHoS6E7TheWarGames "The War Games"]], where the Doctor and Zoe put on the enemy's glasses to pretend they are on the enemy's side and find out what is going on.
** Goes hideously wrong in [[Recap/DoctorWhoS10E4PlanetOfTheDaleks "Planet of the Daleks"]], where the leader of the Thal task force, Taron, dresses in a Spirodon robe. This only means that one of the other Thals goes up to a random Spirodon thinking it's Taron and nearly gets himself clubbed to death.
** In [[Recap/DoctorWhoS12E4GenesisOfTheDaleks "Genesis of the Daleks"]], the Doctor and Harry dress in Thal uniform in order to rescue Sarah Jane. The Doctor gestures to the guard, who comes over, and the Doctor blocks his exit while Harry goes in for a GroinAttack that leaves him unconscious. Later Harry dresses in the Kaled [[StateSec Military Elite]] uniform to rescue the Doctor from Nyder.
** In [[Recap/DoctorWhoS13E3PyramidsOfMars "Pyramids of Mars"]], the Doctor strips the bandages and outer casing from a Mummy Robot and dons them in order to sneak explosives into the Osirian ship.
** Subverted in [[Recap/DoctorWho2006CSTheRunawayBride "The Runaway Bride"]]; the Doctor steals a guard's uniform and uses it to infiltrate a secret chamber -- but the enemies aren't fooled for a second.
** [[Recap/DoctorWhoS30E17E18TheEndOfTime "The End of Time"]] - how ''did'' the cactus-person Vinvocci get that guard's helmet over his head, anyway? Ow.
** In [[Recap/DoctorWhoS34E5TimeHeist "Time Heist"]], after being thought to be dead, [[spoiler:Saibra and Psi return disguised as bank security. Psi had to appropriate a uniform from somewhere, while Saibra can just mimic the uniform with her holographic shell. Saibra's shapeshifting ability allows the writers to [[PlayingWithATrope play with]] the "faceless goons remove helmets to reveal allies" aspect of the trope, which initially seems to be ruled out by the fact that one of the security guards already has his helmet off; that one is Saibra wearing a false face]].
** [[Recap/DoctorWhoS35E8TheZygonInversion "The Zygon Inversion"]]: [[spoiler:Kate Lethbridge-Stewart impersonates the Zygon who tried to kill her ([[FiveRoundsRapid she took care of it]]) to infiltrate [[FluffyTheTerrible Bonnie's]] ranks and learn her plan.]]
* ''Series/{{Farscape}}''. John Crichton infiltrates a Peacekeeper base disguised as an officer (a ploy that had worked successfully before) but encounters BigBad Scorpius for the first time who casually says "Guards, that man is an imposter. [[SeizeThem Seize him]]." It turns out that Scorpius has the ability to see the heat signature of others, so he could tell Crichton wasn't Sebacean.
** John keeps wearing the Peacekeeper uniform throughout the season, though, partially because he doesn't exactly have a whole lot of changes of clothes with him and partially because it makes him look badass.
*** He actually has two Peacekeeper uniforms in that season: the captain's outfit (red and black) which was left behind on Moya by her former crew, and the commando captain's uniform which he wears to infiltrate the base, while impersonating its previous owner. Aeryn also acquires a cast-off female commando's uniform at the same time, which counts as this trope because while she was a Peacekeeper, she was never a commando.
** How often it actually works depends on how merciful the writers are at the time. In "Liars, Guns and Money Part 1," Crichton and Aeryn knock out a couple of guards in the middle of their bank heist, but are ambushed by more guards before they've even finished pulling the clothes off. Crichton flees with a half-hearted "Uh... they went that way!" to the new arrivals.
* ''Fleming: The Man Who Would Be Bond''. Commander Fleming goes into Nazi Germany just before its defeat to find nuclear secrets. He finds a German scientist who agrees to help if Fleming gets him out of there. Then [[TheRemnant SS soldiers]] turn up, kill the soldier with Fleming and chase him into the building. Fleming strangles the scientist's aide, puts on the man's uniform and walks back to the scientist, who pretends to know him. The SS officer is suspicious, but is called away (because the dead man has been found). Fleming and the scientist quickly jump into a truck and drive off. Only to run into the advancing Soviet army [[OhCrap before Fleming has a chance to change out of the German uniform]].
* ''Series/GameOfThrones''.
** Sandor Clegane is riding up to the Twins when Frey soldiers suddenly turn on their Northern allies and massacre them. Sandor escapes the carnage by picking up a discarded Frey banner and riding out of the camp holding it.
** Bronn and Jaime steal Martell men-at-arms uniforms and weapons to infiltrate the Water Gardens, though Jaime complains that Bronn singing out loud will give them away. Prince Trystane however notices that Bronn's Dornish clothing is splattered with the blood of the guard he killed and took it from.
** Daario dresses as an Unsullied to sneak into Daenerys' camp in "Second Sons".
* In Volume 4 of ''Series/{{Heroes}}'', Peter is all set to try this after knocking out one of the black ops agents, until Tracy points out to him what a stupid idea it is (he still puts on the guy's uniform, though, because why say no to free Kevlar?). In a later episode, Sylar does the exact same thing, with much more success, although he has [[PaperThinDisguise much more experience in performing that particular trick]].
** Also used by Hiro and Ando, but Hiro's glasses and lack of English give him away, forcing Ando to stun the other soldiers with his power.
* In the ''Series/{{Highlander}}'' episode One Minute to Midnight. Methos almost lampshades it with the line "You know, this 'Bad guy just my size' routine never works, [=Macleod=]. " Less than a minute later, he proves it DOES work, by donning an Irish accent along with the bad guy's coat and shoots the other henchmen.
* ''Series/HogansHeroes'' used it a lot, to the point where they have an entire wardrobe full of various German uniforms of differing ranks and positions tailored to fit each of the Heroes. In one notable case, a pair of British spies impersonated an SS film crew to film the camp unnoticed.
* Used in a couple of the ''Series/HoratioHornblower'' telefilms.
** In "Even Chance", Hornblower refuses to strike the French flag on the ship they've just captured; unlike when he does this in the books, he keeps it flying when he ambushes the three corvettes attacking his home ship despite being reminded of the Articles of War and only puts the British flag up once the French surrender.
** In "The Duchess and the Devil", he has his crew dress in the French coats left behind on a prize vessel to try and slip past some Spanish ships in the fog; unfortunately one of the Spanish officers has personal knowledge of that ship's capture. They change back after they're forced to surrender.
* A SpaceOpera example occurs in the episode "Asteroid" of the BBC series ''Series/{{Hyperdrive}}''. The Camden Lock leads a pursuing alien fleet through the upper atmosphere of a gas giant so that the planet's atmosphere will destroy the pursuing ships. Following this maneuver, the crew finds that one of the alien ships has survived with its sensors out of commission and is hailing them to determine if they are friend or foe. The crew pretend to be aliens right up until they open fire.
* ''Series/{{JAG}}'': From "Brig Break", in addition to the handful of bad guys who actually are Marines, several others use uniforms to infiltrate the base.
* Rotten Town, Series/LazyTown's evil counterpart has the people dressed like the "evil dude".
* ''Series/MissionImpossible'' episode "Invasion". A hit man is sent to kill the man the IMF is targeting. When he discovers the masquerade he knocks out one of the fake soldiers with a TapOnTheHead and [[MuggedForDisguise puts on his uniform]] so he can pretend to be one of them.
* ''Series/TheNewAvengers'': At the end of "Sleeper", Steed, Gambit and Purdey steal outfits from unconscious robbers and infiltrate the gang, using the balaclavas to disguise their identities.
%%* Used on a number of occasions in ''Series/StargateSG1''.
* ''Series/StarTrekTheOriginalSeries''
** {{Lampshade|Hanging}}d and subverted in the episode "Patterns of Force". Kirk and Spock attempt to do this on a Nazi planet to try and get close to the Fuhrer, who happens to be a Federation citizen. Not only does Spock question the logic of doing so (only to concede that it is in that circumstance), but they end up getting caught shortly afterward because of a lapse of protocol they didn't know about. Double-subverted when they try it later and manage to succeed.
*** [=McCoy=] later on beams down dressed as a Nazi military doctor upon Kirk's instructions--implying that the ''Enterprise'' has a whole wardrobe department stocked with historical uniforms and other clothing (this was before the replicator, which would have made more sense). Because Kirk and Spock have already been caught, and [=McCoy=]'s boots don't fit quite right, [=McCoy=] is captured as well.
** In "The Enterprise Incident" Kirk dresses as a Romulan (including getting an "ear job") to infiltrate a Romulan ship and steal its cloaking device.
** Kirk and Spock also disguise themselves as gangsters in ''A Piece of the Action''.
* ''Series/StarTrekDeepSpaceNine''. Played completely straight the first time we actually meet the Breen.
* ''Series/StarTrekTheNextGeneration''. In an involuntary example of this trope, Troi wakes up at the start of an episode to find herself cosmetically augmented to look Romulan.
* ''Series/StarTrekVoyager''.
** In "Faces" Chakotay has to disguise himself as a Vidiian guard. Another guard gets suspicious because he doesn't recognise Chakotay, but fortunately the Vidiians are involved in OrganTheft because they're infected by a BodyHorror disease, so Chakotay says he just had a new face grafted on.
** In "Warlord" [[GrandTheftMe Kes has her body taken over]] by the eponymous warlord Tiernan. Tuvok tries to infiltrate his palace by posing as one of the FacelessGoons, but as Kes has {{Mind Meld}}ed with Tuvok previously, Tiernan (who is making use of her mental powers) recognises his thought patterns.
** Tom Paris mentions this trope in regards to ''Film/TheAdventuresOfCaptainProton'', a holodeck program based on cheesy 1930's sci-fi film serials. As Tom created the program, he's already arranged for the supervillain's mooks to have the requisite face-concealing helmets.
* ''Series/TheSwampFox'' had an episode where Marion dressed as a Redcoat to try and free an arrested Mary. But it backfires and they both need the brigade to break them out of jail.
* ''Series/TinMan'': In an homage to ''Film/TheWizardOfOz's'' example, Cain and Glitch (the TinMan and Scarecrow [[{{Expy}} Expies]]) mug a couple of Longcoat {{Mooks}} for their distinctive jackets in order to break into the palace and free DG and Raw from captivity.
* ''Series/UnsereMuetterUnsereVaeter'': When Friedhelm is abandoned behind enemy lines, he takes a dead Red Army soldier's uniform to sneak past the Soviets, but this results in him getting shot dead center by the Germans and he nearly dies from blood loss.
* The rebels often borrow the Visitors' uniforms in the miniseries and series ''Series/{{V 1983}}''. In the original miniseries, Donovan takes the uniform of a much smaller, female Visitor, who explains that it will stretch to fit him. Apparently they're one-size-fits-all. They also have to avoid speaking due to the fact that the Visitors' voices have a flanging effect to them.
* Discussed and Deconstructed in ''Series/YoungIndianaJones'' in the "Prisoner of War" episode when Indy is sent to a prison during UsefulNotes/WorldWarI; a guard warns prisoners against any means of escape, warning many of them wouldn't work in this prison. He does bring up that anyone disguising themselves as a guard would be shot as a spy.

* ''Machinima/RedVsBlue''. To fool the Reds into thinking they have more than one freelancer, Tucker and Caboose are ordered to draw the Red's fire while wearing black armour. How do they get black armour? By jumping through a very experimental teleporter.
** Later in the series, Simmons defects to Blue team, originally because he was shunned by the others, but when Church returns, he begins a charade to try and learn information. To get the effect, he paints his armour blue (although he misses a few spots), but it is subverted in that Church is not fooled by this disguise for one second. Church even takes advantage of the situation by making Simmons do chores and make him lunch...
** Season 12 takes this trope, and ends up deconstructing it. Two soldiers dressing as the enemy works okay for the regular guards, but [[spoiler:[[ImplacableMan Locus]] sees through it, and kills one, while the other is mistaken for a EOD specialist, and called over to remove a sticky explosive that his allies have planted and dies when Felix blows up the building]].

[[folder:Tabletop RPG]]
* ''TabletopGame/{{Earthdawn}}'' supplement ''Prelude to War'', adventure "The Dragon's Daughter". The {{PC}}'s must dress up as members of a mercenary band to infiltrate the Theran Behemoth ''Triumph''.
* In ''TabletopGame/{{Exalted}}'' you have charms that make any disguise you want to wear, perfect and infallible to non-magical means of perception. A Night caste Solar can infiltrate anything he wants.

[[folder:Video Games]]
* In ''VideoGame/TheSaboteur'', Sean is able to knock out a Nazi soldier and take their jacket. However he must only stealth kill to get the outfit as the blood would immediately give him away. Also it is noted in the How To part of the game that Sean reeks so much of booze and smokes that if he was to get to close to the Nazis for too long they will be able to spot him out. That, and he only ever takes the jacket and headgear, and leaves the pants and boots alone. While it's justified for a few reasons (there's usually too much risk to spend time putting on the full uniform and, in any case, the guy's likely soiled himself as he goes down - [[{{Squick}} not pretty]]) it does result in him being out of uniform from the waist down. Also, for whatever reason, Sean also refuses to wear the armband as well.
* A main ability of the protagonists in ''VideoGame/SpyFiction''.
* ''VideoGame/MetalGear'':
** ''VideoGame/MetalGearSolid2SonsOfLiberty'' features an enemy uniform that can be worn by Raiden. It averts the Universal Uniform trope, if only in the mildest way: the uniform is a little too small for Raiden, and if an actual guard touches him, it instantly falls off, mandating a tactical withdrawal.
** In ''Portable Ops'', you recruit your squad from captured enemy soldiers, so nearly all of them are dressed similarly if not identically to the guards found around the levels.
** ''VideoGame/MetalGearSolid3SnakeEater'', in turn, requires you to knock out a GRU officer and steal his uniform. The officer in question looks suspiciously like Raiden. When playing in most of the uniforms, you can't do anything too weird (rolling around, beating up guards, etc.) or you'll be caught. As the GRU officer, you're explicitly allowed to do anything you want, because "Raikov's just like that". It's probably because no-one wants to tick off [[spoiler:the villain's boyfriend]].
** In ''MGS 3'', Snake is required to dress in scientist garb twice, once to infiltrate a warehouse for a rescue mission and the other to infiltrate a military base... for a rescue mission for the ''same person''. Armed guards don't spare a second glance (unless you stand in their way or something, in which case they kick you over for no reason before moving on), but if one of the actual scientists sees your face, they will stare at you for a while before sounding the alarm since they don't recognise you. Hence, turn away so the scientists can't see your face. It's anyone's guess how this works in the first place, since Snake doesn't look Russian at all, he's far from clean-shaven, and this works as normal while ''missing an eye'' (which, of course, isn't reflected on the ID badge).
** Meryl dresses as one of the guards in the first ''VideoGame/MetalGearSolid''. It works pretty well, considering that she even gets spotted at some point but is able to evade the guards just as well as the player could. It also means that the player has to keep an eye on the hip movements of the soldiers in that area while they're walking to find out which one is Meryl, because she has a distinctive way of walking.
** In ''VideoGame/MetalGearSolid4GunsOfThePatriots'', you dress as... technically, ''potential friendly''. Rebels, while seeing you in standard uniform, will warily move around you, even attacking you if you get too close. You have to build relationship with them by giving them items and attacking PMC troops. However, wearing their uniform will instantly give you their trust, which makes your life easier.
* Several missions in ''VideoGame/CityOfHeroes'' and ''City of Villains'' give you an enemy disguise as a temporary power, allowing you to move freely among enemies while it's active.
* ''Franchise/FinalFantasy'':
** [[GenkiGirl Selphie]] and her squad in ''VideoGame/FinalFantasyVIII'' do this to infiltrate the Galbadian missile base; hijinks ensue.
** In ''VideoGame/FinalFantasyVI'', when Locke infiltrates South Figaro, you can switch between Locke's normal outfit, a merchant outfit, and an Imperial guardsman outfit; if you rescue Celes while wearing the guardsman outfit, Locke hides in plain sight as the enemy soldiers walk out, and there's a ShoutOut to ''Star Wars'' during the actual rescue.
** Partially subverted in ''VideoGame/FinalFantasyVII''. The heroes sneak aboard an enemy ship wearing the enemy army's uniforms. However, one of the teammates, a lion-like quadruped, stands out quite a bit as he staggers about trying to walk on two legs. Also, his tail is showing.
** Spoofed in ''VideoGame/FinalFantasyIX''. Zidane and Blank steal Pluto Knight armor, and comment about the armor being sweaty, stinky, and breadcrumbs being in the pockets.
** A major part of the Chapter 2 story mission in ''VideoGame/FinalFantasyX2'' revolves finding and stealing the appropriate mook-gear to infiltrate the enemies hideout in Guadosalam. Despite the fact that this is mentioned during several of the battles with the mook's bosses, they never realize that those stolen uniforms are being used for infiltration even when you're talking to the mook's bosses in the base.
** In the Heavensward expansion of ''VideoGame/FinalFantasyXIV'', Thancred is seen doing this when the game switches to him and Krile via event movie, infiltrating the Castrum fortress
* ''VideoGame/ChronoCross'' features a particularly goofy example. Access to the inner sanctum of Viper Manor requires the heroes to dress up in the uniforms of three guards. Three radically different-looking party members will all look the same, but pretty puffy pink pooch Poshul doesn't even bother putting on a uniform. Nobody seems to notice two guards hanging out with a neon-pink talking dog.
* The cartoonish class-based FirstPersonShooter ''VideoGame/TeamFortress2'' gives this ability to the Spy class, who is able to dress as any friendly or enemy character class. Opposing players see the model he is disguised as, but his allies see the Spy model in a [[PaperThinDisguise cheap cardboard mask]] of the class he's impersonating. He also steals the username of one opponent who is playing the class he's impersonating, so if you see another you running around, raise an alert right quick.
* ''VideoGame/RedFaction'' features a slightly more realistic version in which your disguise will only stand up if you avoid getting closer than about ten feet to an enemy guard/camera for longer than around a second (you're basically public enemy #1 at this point). Even though it may be faster to run through guns blazing, you [[ButThouMust still]] need to switch clothing. The second time around, feel free to skip the disguise.
* In ''VideoGame/KnightsOfTheOldRepublic'', you have to do this twice:
** Once, you wear a stolen Sith uniform to gain access to the lower levels of Taris. There's also nothing to stop you running around the top level enjoying [[OhCrap people's reaction to a Sith talking to them.]] You later trade the Sith uniform to the Hidden Beks leader who planned to [[InvokedTrope invoke the trope]] by disguising some of his gang in case the Sith tried to take over the Lower City. [[spoiler: Unfortunately, Carth was right in that the Sith decided to go with the "much more grand and deadly" idea of razing the planet]]
** Later you have to wear Sand People's robes to safely approach a Sand People Enclave. The Tusken Raiders realise you're an imposter on closer inspection but at least you get through the door without a massive fight breaking out.
* ''VideoGame/PlanescapeTorment'' allows the main character several methods of escape from the beginning "dungeon"--including stealing one of the "guard's" uniforms or getting oneself disguised as a zombie (which are commonplace). Both of which result in the only change to the character's outward appearance (aside from what kind of weapon he's holding) in the entire game.
* Used twice in ''VideoGame/MetroidPrime3Corruption''. Early in the game, shapeshifter Gandrayda gets the drop on a squadron of pirates by disguising herself as one. [[spoiler:Later in the game, after her FaceHeelTurn, she lures Samus into a trap by pretending to be a Galactic Federation Marine.]]
* The ''VideoGame/{{Hitman}}'' series has this as a key gameplay mechanic. No matter who you knock out, their clothes will always fit, and the others will never notice that their friend is now a bald white guy with a barcode tattooed on his head (except in the Japan levels in ''[[VideoGame/Hitman2SilentAssassin Silent Assassin]]'', where each guard's uniform has an ID tag, which is used to determine which specific area they must patrol. If your disguise's ID does not match the area you're in, the guards will attack you). And in certain missions, you even get to take your ''target's'' clothes after you've killed them, adding insult to injury.
* As much as the series loves prison break chapters, only ''[[VideoGame/FireEmblemTellius Fire Emblem: Path of Radiance]]'' has a character pull this off: [[spoiler: Naesala, to rescue the captured heron princess Leanne. But how did he hide his wings? I know he had a cape, but still]]!
* In ''VideoGame/GrandTheftAutoViceCity'', one mission includes you and Lance Vance beating up two cops and taking their uniforms. They fit perfectly, although Tommy Vercetti complains that it's "a bit tight around the crotch".
* One of the missions in ''VideoGame/{{Bully}}'' has Jimmy put on an Aquaberry sweater and posh hairdo to infiltrate the Preppies fraternity house. Funny that he can change his length of hairstyle at will, despite having a buzz cut. The magic of video games!
* And don't even ''ask'' about some of the disguises that ''VideoGame/LeisureSuitLarry'' fits in. Granted, it's all parody, but still, the Vegas-style showgirl outfit????
* Happens multiple times in ''VideoGame/MOTHER3'', and two times the enemy ''helps'' you disguise yourself. When the team infiltrates Thunder Tower, the Pig Masks mistake Lucas for their commander, and give him his "usual" clothes, and Pigmask outfits for the rest of the party. Later, Lucas and Boney infiltrate the Chimera Labs and are given Pigmask uniforms to complete their masquerade as part-time workers. [[spoiler:Given [[ImpersonatingTheEvilTwin who the aforementioned "commander" is]], this makes sense.]]
* Some missions in ''VideoGame/MedalOfHonor'' games require dressing up as a German officer and displaying credentials to gain access to valuable targets like a submarine or rail gun. Someone always eventually sees through your disguise, sometimes almost immediately (such as in ''Frontline'', where the first person you show your confiscated ID to recognizes you as an imposter).
** Kinda parodied in ''Medal of Honor: Rising Sun'' where you have to steal one officer's uniform, and upon showing the pass for the officer on railroad station's door, looks at you for a moment and says: "Damn, that just must be other photo of you!" and opens the door for you.
* In ''VideoGame/LightCrusader'', you get a goblin costume that you use to sneak past guards.
* ''Franchise/SuperMarioBros'':
** In ''VideoGame/PaperMarioTheThousandYearDoor'', Princess Peach dons an X-Naut uniform in order to get information from her captor. The disguise is flawless, [[CostumesChangeYourSize despite X-Nauts being around half of Peach's height]].
** In ''[[VideoGame/MarioAndLuigiPartnersInTime Mario & Luigi: Partners in Time]]'', [[spoiler:[[BigDamnHeroes Kylie Koopa shows up disguised as a Shroob and shoots away all the enemies with a blaster when you get caught on the Shroob mothership]].]]
** In ''VideoGame/SuperMario3DWorld'', certain levels have a PowerUp that lets you dress as a [[TheGoomba Goomba]] in order to keep from getting attacked by enemies. It works perfectly despite [[PaperThinDisguise the player character's legs being noticeably exposed]].
* Used in ''VideoGame/Sly3HonorAmongThieves'' to sneak past mooks. They still grill you for a 'password', but won't attack.
* In ''VideoGame/PerfectDark'' Joanna, among other clothing changes across the game, disguises herself a couple of times to get past armed guards and the like. The first time is in Area 51, where she disguises herself as a lab technician to get to some scientists before they can start dissecting an alien, and the second time is in the air base in Alaska so she can sneak aboard Air Force One and show evidence of a conspiracy to the President.
* ''VideoGame/WorldOfWarcraft'' features a few opportunities to disguise yourself as an enemy, usually only for the duration of a quest. There's also a very rare item that allows the player to disguise themselves as the enemy player faction (A Horde Player becomes disguised as the Alliance and an Alliance player becomes disguised as the Horde, respectively). Creative-minded players have even gone to the trouble of purposefully not completing those quests where a Disguise item is provided, and have used it in various ways, such as pranks, getting the drop on an enemy player (which is playing this trope straight), or [[RuleOfFun just for fun]].
* Rogues and Warlocks in ''Silkroad Online'' have the ability to transform into players or even monsters.
** Fallen monsters can be transformed into masks, You can dress as hostile monsters to walk past them without attracting aggro which also enables you to use the monster's basic attack. Also some monsters are faster than horses, so you can make multiple masks for utility or sell them for profit.
** Transforming into other players is mostly cosmetic but you can use it in guild wars or sieges to pretend to be a low level and attract weaker enemies on you, or pretend to be high level and make them avoid you.
*** It was possible in the past for a rogue thief to transform into any character while doing a job, which hides your thief alias and allows you to ambush passing traders and hunters.
* This occurs in the beginning of ''VideoGame/HalfLife2''. Barney is officially a Civil Protection officer, which leads Gordon (and by extension, the player) to initially believe he has been captured when Barney helps him escape.
* ''VideoGame/CallOfDuty'':
** In ''[[VideoGame/ModernWarfare Call Of Duty 4]]'', your squad briefly takes the uniforms of enemy soldiers to ambush a convoy. Griggs comments that "you look like a clown in that outfit" and "nothing like a Russian", which means it's a good thing you're high up on a tower away from that convoy.
** A major controversy erupted over a level in ''Modern Warfare 2'', in which the player goes undercover as a terrorist, infiltrates the villain's group, and then helps (optionally, the player can choose not to) gun down dozens of innocent civilians at a Russian airport. However, the villain appears to be too GenreSavvy, [[spoiler:abruptly killing the undercover player at the end of the mission, framing the US for the attack and prompting a Russian invasion of Washington DC. However, the villain was actually told of the undercover player by US General Shepherd himself, who wanted to start a war in which he could use the full power of the US military]].
** One level of ''VideoGame/CallOfDutyBlackOps'' has you and some teammates steal uniforms from enemy soldiers that you kill.
** ''[[VideoGame/CallOfDutyBlackOps2 Black Ops II]]'' follows suit in a fashion, where one level starts off with you taking control of a deep-cover agent within Cordis Die, shooting at Yemeni soldiers and being assisted by the same mercenaries you've been shooting for most of the rest of the game, until the halfway point where you switch perspective back to the usual protagonist. The finale also has Menendez attempt this, stealing a SEAL's uniform to try and escape, though he's discovered almost immediately when one of the [=SEALs=] with you notices a friendly body (which turns out to be booby-trapped) stripped of his uniform.
* In ''VideoGame/StarFoxAdventures'', after a certain point in the game, Fox gets a Sharpclaw disguise, which, although it allows activate certain pads, pick up certain objects, and not get attacked by ''real'' Sharpclaw or the floating drones, leaves him unable to use Krystal's staff. He can, however, get close, disengage the disguise, and maybe strike before the enemy can react. If the enemy sees him change, he will simply walk toward Fox, pushing him around instead of attacking, or, in Scales' case, [[spoiler:posing threateningly while he waits for you to press A]].
* The player character, Karl, an American soldier is dressed in German gear (as a sniper this is very useful) in ''VideoGame/SniperElite''. Unfortunately he's mostly fighting the Russians.
* ''VideoGame/{{Prototype}}'' takes this one step further: not only can you dress up as the enemy, you can ''become'' the enemy by consuming them whole.
* ''Franchise/{{Pokemon}}'':
** In ''[[VideoGame/PokemonGoldAndSilver HeartGold and SoulSilver]]'', the main character has to dress as a member of Team Rocket to infiltrate the building they just took over. It actually makes sense that it works. Too bad your rival shows up and blows your cover.
** In the ''Manga/PokemonSpecial'' manga, this happens a bit more often. [[spoiler:Red dresses as a Rocket to infiltrate one of their ops, but Blue robs him of the outfit at one point deep in enemy territory. Diamond also infiltrates the (more retarded than usual) Team Galactic airliner by dressing as one of them. Gold, of all people, even gets away with disguising himself as Guile Hideout - and because it physically resembled his own cursed suit of armor, this actually gets Archie killed! That wasn't part of Gold's plan, of course, but a welcome fringe benefit nonetheless.]]
** Looker, being a spy and all, does this a few times.
** One part of the 2007 fangame ''Pokémon Illusion'' requires the player to put on a Team Rocket outfit for infiltration purposes. [[spoiler:Then Giovanni recognizes them when he addresses the grunts.]] Whoops!
* Way back in ''[[VideoGame/EccoTheDolphin Ecco II: Tides of Time]]'', you gained the ability to transform into various enemy creatures using the Asterite's metaspheres. Doing so made them oblivious to your presence (generally foes that either cluttered the screen or could [[OneHitKill kill you instantly]]) -- but you would also be [[FriendOrFoe attacked by other dolphins in the area]].
* In ''VideoGame/TalesOfSymphonia'' the healer of the group [[spoiler: and the failure assassin Sheena, if you chose the hard path]] dress up as Desians to infiltrate one of their ranches to destroy.
* ''[[VideoGame/EverQuest EverQuest: Secrets of Faydwer]]'' features a task called "Disrupt the Workshop", in which you are required to disguise yourself with a clockwork gnome illusion. This allows you to walk freely throughout S.H.I.P. Workshop without drawing the attention of most of its otherwise hostile inhabitants. Since you are allowed to refresh the disguise at will as long as the task is in your journal, this can be abused to make any endeavors in the zone much easier.
* Formerly shown in the trope's image example, we have Milanor of ''VideoGame/YggdraUnion''. During the SaveThePrincess chapter of the story, there are two battlefields where he dons Imperial armor in order to infiltrate the fortress of Karona and look for Yggdra [[ThePlan (the armor is given to him by a would-be traitor who's trying to get a specific prisoner freed]]). During the former battlefield, Milanor cannot do battle when disguised because the stationed soldiers all recognize him right away; your other forces have to sneak in after him and cause a distraction to let him slip through. His disguise is also seen through immediately by the sole guard of the prison, but because there's only one of her and you're between her and backup, you're able to fight and defeat her instead of getting a game over.
* The original ''VideoGame/CastleWolfenstein'' allowed you to dress as a German soldier to sneak by the Nazi guards. Unfortunately, the [[EliteMooks SS Soldiers]] will immediately recognize you anyway.
* ''VideoGame/{{Fallout}}':
** It is entirely possible to beat ''VideoGame/{{Fallout 2}}'' in around eleven minutes, by swiping a suit of enemy power armor and waltzing into their nigh-impenetrable fortress. This trope is also featured in the original, where you can wear robes and almost everyone in the Cathedral will assume you're one of them.
** ''VideoGame/FalloutNewVegas'' lets you disguise yourself with certain factions' armor, which causes those factions to think you're a friendly, but also makes their enemies hostile to you. In other words, walking into an NCR Outpost wearing Caesar's Legion armor (or vice versa) is a good way to get yourself ventilated. Also, the EliteMooks of the faction will see through your disguise if you get too close.
** This was after the aversion in ''VideoGame/{{Fallout 3}}''; on the way to see the President in Raven Rock, it's very possible to mug an isolated Enclave soldier for issue weapon and armor. They don't react any differently, and your impersonation isn't lampshaded or handwaved.
* ''VideoGame/AssassinsCreedII'' has dressing as a guard and carrying a chest to meet [[spoiler: Rodrigo Borgia]]. ''VideoGame/AssassinsCreedBrotherhood'' also has a mission that involves dressing as a guard and carrying a chest to meet [[spoiler: a Borgia]], as well as dressing as a Frenchman alongside Bartolomeo's men to infiltrate the French camp.
* Early FPS/RPG ''VideoGame/{{Strife}}'' has a mission were you need to locate an officer's uniform before you can infiltrate an Order base without setting off all the alarms.
* ''VideoGame/CommandAndConquerRedAlert2'' and ''[[VideoGame/CommandAndConquerRedAlert3 3]]'' have the Allied spy unit which can do this. The Imperial Sudden Transport from ''Red Alert 3'' can disguise itself as an enemy vehicle.
* ''VideoGame/StarcraftII:
** ''[[VideoGame/StarCraftIIWingsOfLiberty Wings of Liberty]]'' features a Zerg organism, the "Changeling", which is capable of assuming the identity of the enemy race, clothes and all, and do some recon. Units won't be able to spot or attack the Changeling without the player's direct intervention in the form of explicit order to attack what appears to be an ally.
** The usefulness of Changelings has been somewhat devalued as of ''[[VideoGame/StarCraftIIHeartOfTheSwarm Heart of the Swarm]]'', due to, of all things, an InterfaceScrew. In all previous incarnations of ''VideoGame/StarCraft'', you could click on any unit and select it. As of ''[=HotS=]'', you can only select units you control; clicking on an enemy unit accomplishes nothing. So when you band-select all your Zealots and one of them follows the others around but is mysteriously un-selectable, you know exactly what's happening.
* ''VideoGame/SpaceQuest'' has you do this in homage to the Stormtrooper disguise in ''Franchise/StarWars''. Later, you lose the helmet and blow your cover.
* ''VideoGame/CovertFront'' has a scene where Kara has to dress in [[UsefulNotes/ImperialGermany German]] officer's clothing so that she can drive past a German checkpoint safely. This all hinges on none of the soldiers getting a good look at her and realizing that she is not only a woman, but also the spy whose photograph is plastered over all their bases; once in Lisbon, Kara still has to avoid all the soldiers guarding the roads.
* In ''VideoGame/{{Ys}} II'', Adol gains a magic that transforms him into a Roo. This lets him gain entrance to the Solomon Shrine, and makes other monsters talk to him rather than attack him.
* ''[[VideoGame/TheElderScrollsVSkyrim The Elder Scrolls V: Skyrim]]'' allows certain races to do this for the quest where the Dragonborn must infiltrate and search the Thalmor Embassy by wearing a set of Hooded Thalmor Robes. An Argonian or Khajit Dragonborn is found out almost immediately ("Wait, is that a tail?"), but a human or elvish (or orc) Dragonborn can sneak through with relative ease, and an Altmer Dragonborn can actually [[BavarianFireDrill order the Thalmor out of the way]]. What's interesting is that this isn't even ''hinted'' at anywhere in the game, leaving it entirely up to [[DevelopersForesight the player's initiative]].
** In one of the Civil War quests, the Dragonborn poses as an enemy courier to deliver disinformation (forged documents) to an enemy commander. If s/he is wearing an enemy uniform, the commander will accept the documents without question. (If s/he is wearing anything else instead, the commander ''will'' question it, but will accept the explanation: [[spoiler:it's easier to blend in without the uniform]].)
* In the last part of the original ''VideoGame/SpaceQuest'', Roger has to infiltrate the Sarien base, which is, naturally, full of Sariens who tend to open fire on humans on sight. Fortunately, Roger arrives in a laundry room where he can gain a uniform from the dryer, and it even has an ID card in the pocket. (''Unfortunately'', this disguise only fools them so long as you wear the helmet, something you might lose while making your way towards your goal.)
* ''VideoGame/{{Bioforge}}'': When wearing the enviro suit, the station personnel will leave you alone unless you attack them.
* In homage to ''A New Hope'', Rookie One and Ru Murleen do this when infiltrating Vader's Super Star Destroyer in ''VideoGame/StarWarsRebelAssault II''.
* One level of the ''VideoGame/QuakeII'' expansion pack ''Ground Zero'' lets you wear a "Strogg Uniform" allowing you to wander around the Strogg facility without any of the Strogg noticing, as long as you don't shoot at anyone. It works until you pass through a bioscanner which blows your cover.
* In the ''VideoGame/SyphonFilter'' series starting with ''Omega Strain'', the player can take enemy outfits from certain corpses, and some missions start you out with or require you to obtain a disguise.
* ''VideoGame/AuraKingdom'': During one quest you need to get behind the local angry centaurs to repair a broken teleporter. To do so you kill a bunch of [[WhenTreesAttack walking trees]] and then cover yourself in a suit made from leaves and branches. Surprisingly, this ''works''.
* [[DeconstructedTrope Possible, but absolutely impractical]] in ''VideoGame/VelvetAssassin''. You can steal an SS uniform and try to sneak by guards, but they'll see right through your disguise if you do anything remotely suspicious or even just get close enough to them. After all, a sexy ''female'' soldier is going to raise a few eyebrows, especially in Nazi Germany.
* While pursuing Atlas/Fontaine in the final areas of ''VideoGame/BioShock1'', Jack takes on the guise of a Big Daddy, complete with voicebox modification and pheromones, to gain the help of the Little Sisters in accessing doors only they can open. It also fools the security cameras and turrets, although they still attack the Little Sisters.
* ''VideoGame/DarkSouls''
** One [=PvP=] "troll" tactic is to dress up in an armor set worn by an enemy, and then stand completely still where that enemy usually stands. Depending on the armor set, this can make one practically identical to that enemy, meaning that Invaders (whom enemies cannot interact with) will [[https://www.youtube.com/watch?v=Ywyll7GUG5Q sometimes run right past without noticing the player]].
** ''VideoGame/DarkSoulsIII'' contains a ring that allows a hostile Invader to assume the appearance of a friendly phantom. Inattentive hosts will let their guard down... and then get stabbed in the back (probably [[BackStab literally]]). Members of [[WildCard Mound Maker]] covenant can take one step further by disguising themselves as a friendly summon since their name tags are marked as white instead of red, and they can actually attack the enemies in the host's world.
* In ''VideoGame/{{Bloodborne}}'', you can also disguise yourself as hostile hunters to deceive the adversaries.
** Should you obtained Yahar'Gul Hunter Set, provided Vicar Amelia was alive, you can [[https://www.youtube.com/watch?v=xsd4ibjGH1M pretend yourself as the Tonitrus Hunter]], it doesn't help that the Rifle Spear Hunter wouldn't disturb you as long as you keep the distance. You can also do this to the [[https://www.youtube.com/watch?v=8UL7zgFngX4 Cannon Hunter]] in Yahar'Gul.
** Another option is to disguise as the [[https://www.youtube.com/watch?v=K-aDnk9yEgs Old Hunters]].
** Hostile hunters in Chalice Dungeons are completely prone to this.
* In ''VideoGame/{{WarWind}}'', there is a unit modification which allows to disguise as an enemy unit. This can be applied both by you and your computer opponents.
* Subverted in ''Zoids Assault''. While its possible to wear the enemy's camo pattern and [[BlatantLies its description says it can confuse them]] it has no discernible affect.
* In ''VideoGame/GuildWars'' some quests involve disguising yourself as an enemy faction to spy on them. ''Nightfall'' had two story missions where you spent a majority of the gameplay in disguise.
* One of the memorable highlights of the ''VideoGame/{{Commandos}}'' PC series. It's one out of may methods to get close or go into enemy occupied areas. Finding the right disguise on the other hand may lead to some trial and error...
* In ''VideoGame/ShinMegamiTenseiIVApocalypse'', one particular mission the heroes are tasked with involves infiltrating Mikado. Which isn't exactly easy, as there's a guard posted in the Firmament caverns leading up to Mikado, so [[MissionControl Fujiwara]] comes up with the idea of having the protagonists put on Samurai uniforms and fake [[SuperWristGadget Gauntlets]] so they can sneak in. Toki and Asahi also put on makeup to give the impression of age, as they're in their mid-teens and only people over 18 are qualified to be Samurai. As it turns out, the guard only checks for valid Gauntlets (which the heroes' Gauntlets all are); you can swap out the Samurai uniform for your other armor and it won't make a difference. [[spoiler:They're able to sneak around fine until Merkabah sees through their ruses and points it out, getting the group imprisoned.]]
* In ''VideoGame/TheLegendOfZeldaBreathOfTheWild'', Link can obtain Bokoblin, Moblin, and Lizalfos Masks that allow him to move among those enemies without being attacked, since they will see Link as one of their own. It only works on one type at a time though: a Moblin will not be fooled by a Lizalfos Mask, etc. There is even a Lynel Mask, but the [[DemonicSpiders Lynels]] will see through the disguise given a minute or two and attack anyway.

* Subverted in ''Webcomic/AntiheroForHire''. While the protagonist wears a Mantis Agent's outfit, which conceals the individual from head to toe, the Mantis use electronic and DNA based identification systems, and is immediately recognized as an intruder.
** Played straight [[http://www.antiheroforhire.com/d/20080912.html here]] then subverted later [[http://www.antiheroforhire.com/d/20080929.html here]] with a beautiful OhCrap moment by Shadehawk followed by a PrecisionFStrike.
* Played with in [[http://www.sluggy.com/comics/archives/daily/20091016 this]] ''Webcomic/SluggyFreelance'' strip.
** [[http://sluggy.com/comics/archives/daily/091110 Done again]] later in the same StoryArc.
* Subverted in ''Webcomic/AnotherGamingComic'' - the player characters done cultist robes, but the GenreSavvy villain has magicked said robes to alert him and all of his other cultists to the fact.
* Sojueilo, Thomil and Mijuu of ''Webcomic/{{Juathuur}}'' disguise themselves as Solluu in order to infiltrate Erab Adur.
* In ''Webcomic/TheDreamer'', Alan dresses up as a redcoat to rescue Beatrice from Gen. Howe's ship.
* Liquid of ''WebComic/TheLastDaysOfFoxhound'' had to dress up as a mook to break into the fortress. [[http://gigaville.com/comic.php?id=164 He didn't really fool anyone.]]
* ''Webcomic/BobAndGeorge'': [[http://www.bobandgeorge.com/archives/041003c Bass needs a disguise]]
* ''Webcomic/WaywardSons'': A number of Ulympeans do this while infiltrating Egypt. Having a MasterOfIllusion on your side doesn't hurt, either.
* In ''Webcomic/TalesOfGnosisCollege'', Professor Corwin and Li Anwei escape from Federal custody by expropriating the gear of the GasMaskMooks in Senator Madder's "security detail."
* Inverted and played with in ''Webcomic/OurLittleAdventure''. While [[BigBad Brian Souballo]] doesn't impersonate any of the heroes of the story, he magically impersonates a neutral wizard he tried and failed to recruit to his side. The Emperor goes to the very elven metropolis he's planning on invading and commits a mass murder while disguised as the neutral wizard. This way if the wizard goes to the city to warn the elves, he will instead be arrested.
* In [[http://www.spinnyverse.com/index.php?id=521 this strip]] of ''Webcomic/{{Spinnerette}}'', a supervillain sneaks into a military installation wearing one of their troops' all concealing uniforms. He mentions to the officer in charge that it's not a good idea to outfit troops with uniforms that hide their faces, even referencing the FacelessGoons entry on this very wiki.
* Done in ''Webcomic/TheOrderOfTheStick'' by Celia when she has to smuggle Belkar and Haley ([[spoiler: as well as Roy's corpse]]) out of Azure City. She disguises herself as a necromancer, calls Mr. Scruffy her evil cat familiar, and uses eyeliner to draw Xs over Belkar and Haley's eyes so that they look dead. She's almost found out when one of the guards calls her out on not being a necromancer, at which point Belkar "rises from the dead", kills the guard, and asks if anyone else wants to question his creature type. Surprisingly, it works.
** ''Far'' more common is the enemy disguising themselves as a hero. Sabine, being a shapeshifter, frequently disguises herself as guards or policemen. Nale spends a good part of ''War and XPs'' disguised as Elan (made easy given that they're identical twins), with Elan in jail on Nale's behalf. Zz'dtri disguises themselves as one of Tarquin's aides during the Order's time in the Empire of Blood (so that they can reveal themselves along with the rest of the Linear Guild). Lastly, in a bizarre case of Enemy Dressing as the Enemy, Tarquin disguises himself as Thog because he considers Thog to be too much of a loose cannon, but they can't let on that it's really Tarquin fighting them.
* Gordon Frohman does this a few times in ''WebComic/{{Concerned}}'', though it's up for debate whether it's really dressing as the ''enemy'' considering [[HorribleJudgeOfCharacter he absolutely loves the Combine]], but [[MinionWithAnFInEvil is so bad at helping them he may as well have been with the Resistance the whole time]].
** The first time is for part of "Bike Lane 17", where he meets up with another group of Combine who take him to the bridge outpost. He ends up giving away that he's not a real Combine when he's unable to pass through the force fields on the bridge[[note]]there was another minor instance where he gave it away during a trip in an APC, but [[LoadsAndLoadsOfLoading then they hit a load screen]] and forgot all about it[[/note]], and in the process of dumping the outfit, accidentally gets it stuck in the rotors of a gunship, which promptly crashes into the bridge and destroys everything.
** The second time is during the uprising after Gordon Freeman has returned, where Frohman's gotten tired of being shot at by the Combine, and decides the best way to avoid this is to dress as one of them. Of course, [[FriendOrFoe this just leads to the other rebels shooting him]] until he gives up and dresses as a medic, figuring that the rebels will appreciate his healing skills and the Combine won't shoot him in accordance with Subsection B of the resolutions of the Geneva International Conference. Of October. 1863. Neither part works out how he hopes, though, as [[ShootTheMedicFirst another Combine blasts in with a shotgun]] the instant he finishes his monologue, and [[DeadlyDoctor his insistence on performing surgery]] over just giving people medkits just gets even more Rebels killed.
** The last time is after Henderson quits, and Frohman decides to steal his Combine Elite uniform for a bit. This doesn't play into much before he ditches the outfit again.

[[folder:Web Original]]
* In ''Roleplay/TheGamersAlliance'', the heroes of the Alliance use stolen black cleric robes to infiltrate a city held by the Clergy of Mardük during the Great War. The plan would've been a smashing success if one of them wasn't a mole working for the clergy and leading them into a trap.
* Borman's idea for getting Yaeger near TheMercuryMen's Gravity Engine.

[[folder:Western Animation]]
* [[InvertedTrope Turning the trick around]], in ''WesternAnimation/AvatarTheLastAirbender'' "[[Recap/AvatarTheLastAirbenderTheEarthKing The Earth King]]", the Fire Nation ''antagonists'' dressed up as ''allies'' of the protagonists.
** Played straight in the first half of season 3 when the Gaang travels though the Fire Nation in local outfits, change their hair styles and Aang even uses a fake name (Kuzon; and when Sokka doesn't he's given away instantly).
** Also near the beginning of Season 3, Hakoda uses a Fire Nation ship (with some of the Gaang's allies dressed in Fire Nation armor) in an attempt to blend in when sailing through Fire Nation waters. Aang almost believes he's been captured by the Fire Nation ([[spoiler:having been in a coma for a few weeks]]). Hakoda spoils the ruse when he mentions getting orders from a commander currently on leave.
** Also in "The Boiling Rock", Sokka and [[spoiler:Zuko]] disguise themselves as prison guards. Cue icons of Suki delivering Princess Leia's line.
*** Dressing as the enemy gets Sokka into to trouble twice with the very people he was trying to rescue, by not identifying himself to them. Suki punches him into the door, Hakoda ''almost'' does.
** Aang adds a hat to hide his arrow tattoo when the Gaang dons the Fire Nation garb again in "[[Recap/AvatarTheLastAirbenderTheEmberIslandPlayers The Ember Island Players]]," although [[spoiler:Zuko]]'s [[YourCostumeNeedsWork costume needs work]].
** Subverted in the season 1 finale, when a Water Tribe warrior uses antique Fire Nation armor to infiltrate the flagship, and when he tries to kill the admiral, he gets [[OffhandBackhand offhand backhanded]]. Although that was probably less because of a failure of his disguise than because he pulled off his helmet and [[MyNameIsInigoMontoya declared himself]] [[TooDumbToLive before attacking.]]
** [[spoiler: Zuko]] plays with this trope near the end of season 1, disguising himself as a [[FacelessGoons Fire Nation soldier]] to infiltrate Zhao's ship (played with because [[spoiler: he ''is'' still an enemy at this point, but he's disguising himself to get past ''his'' enemy]]).
* Danny and Tucker briefly disguises themselves as two ghost henchmen in ''WesternAnimation/DannyPhantom'' to rescue Sam from marrying a ghostly prince, much to her dismay as she was orchestrating her own method of escaping just fine.
* A frequent issue for ''WesternAnimation/DarkwingDuck''; it seems Saint Canard thinks anyone in the purple suit, cape, and hat is Darkwing. Very annoying when your EvilTwin does this, of course.
* ''WesternAnimation/FamilyGuy''
** Spoofed in an episode where Peter beats up a bellhop and robs him of his uniform (which doesn't fit) only to be informed that the person they're after doesn't know who they are, making that unnecessary. Fortunately, another man wearing the exact same outfit as Peter happens to walk by.
** In "Road to Germany", Stewie, Brian, and Mort stole Nazi uniforms (with [=McCain=] Palin button on Stewie's uniform) to infiltrate a nuclear facility.
* A common occurrence in the various ''Franchise/GIJoe'' series. It's particularly common in ''WesternAnimation/GIJoeRenegades'', as the Joes (who are a [[RagtagBunchOfMisfits small group]] of [[ClearMyName outlaws]] in this incarnation) frequently infiltrate COBRA Industries to try and find evidence of the company's crimes, and their CoolCar is a stolen advanced COBRA truck, that can change colour and marking to blend in as any truck.
* ''WesternAnimation/TheHerculoids''
** "The Crystalites". Zandor, Gloop and Gleep knock out some guards and enter the title opponents' fortress dressed in their uniforms.
** "Ruler of the Reptons". After knocking out several reptanks, several Herculoids use the tanks' shells as disguises to approach the enemy base.
* ''WesternAnimation/JonnyQuest'' TOS episode "The Fraudulent Volcano". After Jonny and Hadji knock out a couple of guards, Dr. Quest and Race don their uniforms while attempting to ''escape'' the enemy base.
* In ''WesternAnimation/KimPossible'', Ron dresses as a henchman in "Odds Man In" and uses it to successfully scare Drakken's men into quitting by mention probability hazards before saving Kim.
* Played so painfully straight in one episode of ''WesternAnimation/MightyMax''. Needing to dress as members of a cult, Max, Norman, and Virgil mug some average-size cultists and steal their robes. It's worth noting that Norman is over 7 feet tall and heavily muscled, Max is a skinny kid, and Virgil is a four foot tall chicke...er...[[InsistentTerminology fowl]]. The robes, of course, fit perfectly.
* ''WesternAnimation/ThePowerpuffGirls'' episode "Bubble Boy" has Rowdyruff Boy Boomer captured by the girls. Bubbles impersonates him and infiltrates the Rowdyruffs in a bid to capture the other two. It's a nine-day wonder that Butch and Brick didn't catch on to Bubbles' noticeably higher voice and lighter eye color.
* In an episode of ''WesternAnimation/QuackPack'', Dewey and Louie don the clothes of the ''human'' henchmen of the stock villain of the week (some weird pale-faced woman bent on world domination) in order to rescue their brother Huey and foil her evil scheme. Once again, the bad guy in question doesn't notice the species difference.
* ''WesternAnimation/RobotChicken'' parodied this when the Joes are sent to Afghanistan. Three of the Joes dress as terrorists, and then are immediately gunned down by the actual soldiers who mistake them for terrorists.
* ''WesternAnimation/SamuraiJack'' did this in one episode, killing one of Aku's demon soldiers and taking its clothes. (After rescuing the fairy princess, her reaction was a ShoutOut to Leia's reaction to Luke in ''Film/ANewHope''; in fact, that whole episode was ''loaded'' with ''Franchise/StarWars'' references.)
* Spoofed in an episode of ''WesternAnimation/TheSimpsons,'' in which, while trying to sneak out of Vegas away from their new wives, Homer and Ned Flanders pull two janitors into a broom closet to rob them of their uniforms. Punching sounds are audible, and the two janitors walk out content, leaving a beat-up Homer and Flanders. Similarly, in "Burns Baby Burns" Homer and Larry Burns are fleeing from the suddenly half-competent Police (who believe Homer to have kidnapped Larry), and duck into a costume store. The viewer is then shown a man who looks quite a bit like Homer, dressed as an organ-grinder leaving the store with a vaguely Larry-shaped man dressed as his monkey. The subversion comes when we see the clerk look into the store's bathroom, where Homer and Larry are actually hiding: "Either buy a costume or get out, fellas!"
* ''WesternAnimation/StarWarsTheCloneWars'':
** [[Recap/StarWarsTheCloneWarsS4E12SlavesOfTheRepublic "Slaves of the Republic"]]: Anakin, Obi-Wan and Rex go undercover disguised as Zygerrians, or at least criminals and/or slavers wearing Zygerrian armour. Ahsoka, on the other hand, is disguised as a [[GoGoEnslavement slave girl]], which she's not especially thrilled about.
** [[Recap/StarWarsTheCloneWarsS5E16TheLawless "The Lawless"]]: Obi-Wan infiltrates the Mandalorian capital of Sundari to rescue Duchess Satine by luring a supercommando onto the ''Twilight'', and mugging him for his armour.
* ''WesternAnimation/StarWarsRebels'' has this as a relatively frequent occurrence.
** [[Recap/StarWarsRebelsS1E04BreakingRanks "Breaking Ranks"]]: Ezra goes undercover as an Imperial cadet, while [[RobotBuddy Chopper]] gets an Imperial paintjob.
** [[Recap/StarWarsRebelsS1E12RebelResolve "Rebel Resolve"]]: Chopper gets a new and improved Imperial paintjob to infiltrate an Imperial cruiser to steal information on [[spoiler:where Kanan is being held]].
** [[Recap/StarWarsRebelsTheSiegeOfLothal "The Siege of Lothal"]]: Kanan mugs a stormtrooper for disguise, and later on Ezra dons his cadet disguise again.
** [[Recap/StarWarsRebelsS2E07StealthStrike "Stealth Strike"]]: Kanan and Rex go undercover as stormtroopers to free captured rebels, with Chopper along in his Imperial paintjob.
** [[Recap/StarWarsRebelsS2E10APrincessOnLothal "A Princess on Lothal"]]: Kanan and Ezra go undercover as a stormtrooper and cadet to meet Princess Leia so she doesn't blow her cover. This leads directly to the sight of Kanan charging an AT-AT with his lightsaber, ''still'' disguised as a stormtrooper!
** [[Recap/StarWarsRebelsS3E02TheAntillesExtraction "The Antilles Extraction"]]: It's Sabine's turn to go undercover as an Imperial cadet, this time to extract some would-be defectors at an Imperial pilot academy.
** [[Recap/StarWarsRebelsS3E03HerasHeroes "Hera's Heroes"]]: Ezra goes undercover as a scout trooper, and Chopper yet again has his Imperial paintjob, in order to help Hera recover a family heirloom from her old house, which has been occupied by Imperials.
** [[Recap/StarWarsRebelsS3E08AnInsideMan "An Inside Man"]]: Kanan and Ezra go undercover first as factory workers, then as a stormtrooper and scout trooper respectively, while sneaking around Lothal City's Imperial complex. Chopper's also along, repainted as per usual.
** [[Recap/StarWarsRebelsS3E15ThroughImperialEyes "Through Imperial Eyes"]]: Kanan and Rex are back disguised as stormtroopers, Chopper's sporting his paintjob, and Ezra, thanks to [[spoiler:[[ReverseMole Agent Kallus]]]], winds up impersonating an Imperial officer, specifically [[spoiler:Lieutenant Lyste]].
** [[Recap/StarWarsRebelsS3E17DoubleAgentDroid "Double Agent Droid"]]: Chopper goes undercover with his paintjob yet ''again'' -- and this time it proves to be a liability, as the same droid with the same paintjob causing trouble has been seen too many times, and he gets recognized. Wedge also goes undercover as a TIE pilot.
* ''WesternAnimation/SupermanTheatricalCartoons'' In the episode "Jungle Drums" Lois does this, stealing the robe of a dead Nazi Agent in order to use the Nazi-bases radio to warn the Allies of a planned submarine attack. [[spoiler: This fails when the Nazi commander spots Lois's high heels under the hem of her robe.]]
* Done in the "Baloo Thunder" episode of ''WesternAnimation/TaleSpin'' with Baloo, Kit, and their friend Buzz the inventor taking the place of a CorruptCorporateExecutive 's three security guards in order to return a top secret prototype helicopter to its rightful home. Baloo perfectly fits into a uniform even though he's at least ''twice the size'' of the largest guard. Also, the bad guy doesn't notice his feline guards replaced by two bears and a bird until it's too late.
* ''WesternAnimation/TheTransformers'' has the episode "Masquerade" which features the Autobots replacing the captured Stunticons to uncover and sabotage Megatron's latest plan.
* Played dead straightin ''WesternAnimation/TheVentureBrothers'' by the original Team Venture in "Past Tense". Unfortunately this means [[{{Squick}} a squad of elderly men]] in {{Fanservice}}y {{Fembot}} swimsuits.

[[folder: Real Life]]
* In nature, [[http://en.wikipedia.org/wiki/Batesian_mimicry Batesian Mimicry]] is when a harmless species mimics a harmful one, for example, a moth larva looking like a snake head.
* There are insects adapted to prey on ant larvae, which smell just like fellow colony-members to adult ants.
* Thousands of TruthInTelevision examples. Not counting [[FalseFlagOperation false flag stuff]], [[http://en.wikipedia.org/wiki/Operation_Entebbe the 1976 rescue of a large number of Israeli hostages from Entebbe, Uganda had elements of this]]. Note the movie adaptations.
** A number of German soldiers who dressed in American uniforms in late 1944 were summarily executed when caught. After all, as per the Hague Convention of 1907, dressing in the enemy's uniforms is considered a war crime.
* The First Battle of Bull Run during the UsefulNotes/TheAmericanCivilWar had some Union soldiers in grey uniforms and Confederates in blue uniforms. Both sides had not adopted their standard uniform colors until a few months after the battle.
** The battle at Pilot Knob ended with the union soldiers blowing up their cache of ammo and powder, and evacuating the fort under cover of night and rain wearing confederate uniforms.
* It's not actually ''illegal'' per se to dress in the enemy's uniform while engaging in espionage or sabotage but it does mean that you are not a soldier in combat, which means you're an ''unlawful combatant'', and the other side can do to you as they wish after they capture you.
** It is, however, illegal to kill enemy soldiers while still wearing the enemy's uniform whether behind enemy lines or in the open battlefield as it constitutes unlawful acts of perfidy (opening you to war crimes charges). That said, you can [[LoopholeAbuse throw away the disguise]], reveal your faction's uniform beneath and open fire guilt free.
* This was the main modus operandi of the [[http://en.wikipedia.org/wiki/Selous_Scouts Selous Scouts]], a [[UsefulNotes/{{Zimbabwe}} Rhodesian]] special operations unit that would capture terrorists, turn them against their comrades (usually by giving them the choice between that and death) and then send them back to become TheMole. With them, of course, would be white Rhodesian officers or [=NCOs=] disguised as [[{{Blackface}} black terrorists]].
* Navies love this trope. During the Age of Sail, a popular tactic was to raise enemy colours (or, if you were really sneaky, a plague flag) and only lower them at the moment of firing. Died out after advanced naval gunnery and explosive shells meant that it was common practice to sink enemy vessels rather than capture them (the deception only worked if the disguised ship pretended to be a captured enemy one). Still the British raid on St Nazaire used this, flying a German ensign from the HMS Campbeltown. It worked.
** A particularily funny example from World War One also combined with ConfrontingYourImposter. The British and Germans both employed armed merchant ships (the Germans used them to attack British shipping, the British to hunt down German raiders), and often used fake markings, false smokestacks, and other elements to disguise them as the other side's ship. In the 1914 [[http://en.wikipedia.org/wiki/Battle_of_Trindade Battle of Trindade]], the German SMS ''Cap Trafalgar'' encountered the British RMS ''Carmania'', both of which were disguised. The problem was that not only was ''Cap Trafalgar'' disguised as ''Carmania'', ''Carmania'' was also disguised as ''Cap Trafalgar''. At that early point in the war, neither side actually knew which merchant ships the other had converted into auxiliary cruisers, and thus both ships' captains made poor choices of disguise.
* Operation Greif: Otto Skorzeny and a small group of SS Commandos, fluent in English and wearing captured U.S. and British uniforms, infiltrated U.S. lines during the Battle of the Bulge with the main objective of capturing the bridges over the Meuse river. Although they failed due to an insufficient number of fluent English speakers, they did succeed in making the U.S. Army so paranoid about their presence and activities that many checkpoints were set up which slowed down the Allies.
** In the end, an estimated 18 German commandos wearing U.S. uniforms were captured behind U.S. lines during the Battle of the Bulge, tried by military commissions, found guilty, and executed as spies.
** The U.S. troops famously caught some of these spies by asking questions only Americans would be expected to answer correctly, like baseball trivia, particularly trick questions like "What year did Babe Ruth hit 64 home runs?" It didn't always work—one U.S. general was held at gunpoint by a couple of privates after he incorrectly stated that [[GretzkyHasTheBall the Chicago Cubs were in the American League]].
* The greatest theft of private property ever, [[https://en.wikipedia.org/wiki/Isabella_Stewart_Gardner_Museum_theft the $500 million of art stolen from the Isabella Stewart Gardner Museum in Boston in 1991]], was carried out by two thieves dressed as Boston police officers.