[[quoteright:330:[[Literature/MortalEngines http://static.tvtropes.org/pmwiki/pub/images/city_of_london.jpg]]]]
[[caption-width-right:330:Yo dawg...]]

One of the craziest ways a villain can keep their base hidden is to keep it moving constantly around the country. Of course, there's no way your typical ElaborateUndergroundBase will fit into the average mobile home, (unless it's [[BiggerOnTheInside bigger on the inside than the outside]]) but rather than compromise and throw away the SharkPool, the villain will put his base in an overly large truck or train.

Typically, this vehicle is armour plated and two or three lanes wide, and as a result can just careen straight down the middle of the road/railway [[ArsonMurderAndJaywalking ignoring low bridges, other cars and especially the dreaded toll booth]] -- there's almost always a scene of the toll-booth and a few other [[EveryCarIsAPinto cars exploding spectacularly]] as they drive through. The vehicles are also much faster than their real-life equivalents -- the lorries that carry fully-furnished buildings can barely make twenty five miles per hour, on straight, clear roads with police escorts. This of course gets even sillier if the villain does ''not'' scrimp on the size of his mobile base, resulting in mountain-sized machinery zipping about.

UsefulNotes/NaziGermany had several plans on the drawing board that would have been {{Defictionalization}}s of this trope. Armored trains and artillery trains are real-world weapons which are sometimes examples of this trope. Armored trains were thought to be obsolete after WWI, but the UsefulNotes/PolishSovietWar proved that they were still viable, and both the Nazis and the Soviets used them in WWII. Artillery trains are about as old as railroading, and remain viable weapons to this day; they were last used in the Croatian War of Independence, during UsefulNotes/TheYugoslavWars.

This trope is for land vehicles only. For bases hidden in boats or flying vehicles, see CoolBoat, CoolAirship, and CoolSpaceship. MercurialBase is a subtrope dealing with bases on extremely hot planets. MilitaryMashupMachine often overlaps with this, since a BaseOnWheels is just a turret or three away from being a [[MilitaryMashupMachine Land Battleship]]. See ClownCarBase for when the outward size is more reasonable than its contents.


[[folder: Anime and Manga ]]

* The girls from ''Anime/BurstAngel'' live and run their business in one of such trucks.
* Landships of ''Anime/CombatMechaXabungle'' are full scale land battleships carrying around companies of [[HumongousMecha Walker Machines]] and Iron Gear type landships can transform into giant Walker Machins themselves, turning into Base on Legs.
* The ''Anime/ExcelSaga'' episode "Bowling Girls" features the a massive tractor trailer owned by the bowling terrorist organisation which goes straight through a toll booth, but which apparently has no bearing on the story.
* The ''Gundam'' Meta-Verse ''loves'' this trope with all its heart it seems like almost every timeline ''must'' have at least one absurd rolling base/battleship examples include:
** The Universal Century line includes the [[http://www.mahq.net/mecha/gundam/msgundam/bigtray.htm "Big Tray"]] class and the Zeon equivalents the [[http://www.mahq.net/mecha/gundam/msgundam/gallop.htm "Gallop"]] and [[http://www.mahq.net/mecha/gundam/msgundam/dabude.htm "Dabude"]] classes, but all of these pale before the grand champion and perhaps most insane of all examples in UC the [[http://www.mahq.net/mecha/gundam/v/adrastea.htm "Adrastea"]] class yes it's a giant ''motorcycle'' land battleship.
*** In fact, the Zanscare Empire from ''Anime/MobileSuitVictoryGundam'' has several giant motorcycle ships, and one of their plans is the Earth Sweep Operation, which involves metaphorically bulldozing the planet with these ships and their mecha teams.
** The After War Timeline has too many to easily list though of special note though are the [[http://www.mahq.net/mecha/gundam/x/trieste.htm "Trieste"]] class ''Amphibious Land battleship'' which unable to decide if it wanted to be a CoolShip or BaseOnWheels just split the difference, and the [[http://www.mahq.net/mecha/gundam/x/bandaal.htm "Bandaal"]] class ''mobile land fortress''!
** The SEED Timeline meanwhile brings us the [[http://www.mahq.net/mecha/gundam/seed/lesseps.htm "Lesseps"]] class.
** ''Anime/SDGundamForce'' gives us ''Tenchijo'', a castle on giant tank treads. And on each tower is a different weapon; a giant hammer, mace, claw, and spinning blades.
* ''Anime/OvermanKingGainer'' features a city on wheels, functioning as a base and living space for both the heroes and the entire population of the city that was mobilized. The enemies have control of the railroads, so quick transit of their forces makes a mobile base necessary for the Exodus.
* ''Anime/RevolutionaryGirlUtena'' - Movie only. [[spoiler:The castle is on wheels big enough to crush cars, and they try to do exactly that.]]
* ''Anime/TengenToppaGurrenLagann'' features a Base On ''Legs'', the Dai-Gurren.
* The ''Batomys'' from ''Anime/ValkyriaChronicles''.
* In ''Anime/OnePiece'', Capone "Gang" Bege doesn't have one, he IS one. His Devil fruit power allows him to store large amounts of men and weaponry inside his body , including cannon and a full calvary charge.
* ''Franchise/{{Zoids}}'' has mobile bases for the titular mechs to travel in. They are themselves giant Zoids, and therefore animal-shaped. Team Liger travels in a giant snail, the bad guys use a flying sperm whale, and the standard cargo hauler is the pillbug-shaped Gustaff.
* The mobile command centers from ''Anime/CodeGeass'' certainly fit the bill, until they are eventually replaced with flying equivalents. The Chinese still use the [[http://codegeass.wikia.com/wiki/Longdan#Longdan Longdan bases]] into the Second Season, however, along with their cruisers Da Longdan upgrade.
* ''Anime/RobotCarnival'' features a massive robotic carnival on treads rolling over a desert, which due to [[AIIsACrapshoot malfunctions]] is now blowing up [[KillAllHumans everything it comes near]].
* Anime version of ''Anime/SoulEater'' gives us a [[CrowningMomentOfAwesome Awesome]] versions of this. [[spoiler: Death City on Legs!]]. Best yet, it's on the side of the protagonists, and is controlled by a CloudCuckoolander, CrouchingMoronHiddenBadass, AnthropomorphicPersonification of [[TheGrimReaper Death]]. Eye-Poke Attack indeed!
** Even better; this example was set up early, with Dr Stein pointing out that the only way for Shinigami-sama to chase the BigBad would be if [[spoiler: Death City grew legs and started walking]], lampshading the ludicrousness of such a thought and safely making sure no-one would assume that it could, in fact, happen.
* The Fugaku, the mobile sea fortress of Chosakabe Motochika from ''VideoGame/SengokuBasara'' is revealed in one episode to be capable of traveling on land as well as water. [[spoiler: It becomes a completely land-based base on wheels when Mori assumes control of it]]
* The ''April'', the huge magical semi that serves as a mobile base for Gilette Corps in ''LightNovel/CoffinPrincessChaika''.
* In ''Animation/GuardianFairyMichel'', the good guys have Sitel, and the bad guys have their flying castle. All the better to chase each other around the world with.
* ''Manga/{{Naruto}}'' - The Big Bad in the [[Anime/NarutoTheMovieLegendOfTheStoneOfGelel second movie]] had one of these, in addition to a number of World War 2 style warships. Needless to say they actually managed to looked out of place even in the SchizoTech the series runs on.
* The ''Anime/SpeedRacer'' episode "The Mammoth Car" had Cruncher Block hanging out in the well-furnished (complete with piranha tank) back of the titular car, essentially a big red truck.


[[folder: Comic Books ]]
* ''Comicbook/StrikeforceMorituri'' had its heroes roll around the country on a train-headquarters fighting alien invaders, after their mountain base was destroyed in a nuclear bombardment.
* Part of the "future" ''Comicbook/ElfQuest'' story "The Rebels" takes place in a large complex on a Mercury-type planet that has an incredibly hot day side and a cold dark side. The base runs on rails laid around the planet's equator in order to stay on the dark side as the planet slowly rotates. Lucky there aren't any saboteurs on board, eh?
* The setting for almost the entirety of the Richardo Barreiro graphic novel Moving Fortress.
* In a [[Comicbook/ThePunisher Punisher]] / Comicbook/GhostRider team-up, the duo fought drug dealers who had a giant mobile base called The Roaring Island, which is made from different vehicles (cars, trucks, a tank etc.) linking up together.
* ''ComicBook/BlackMoonChronicles'': Wismerhill buys a traveling castle from the dwarf masters to use in his next campaigns. The dwarfs even shaved off half the price since the lord who originally commissioned it had spontaneously died.
* Jack's Kirby's [[Comicbook/NewGods Fourth World]] series -- in particular, his early run on ''ComicBook/JimmyOlsen'' -- featured the "Mountain of Judgement", a mobile home for the Hairies, a bunch of genetically modified young humans (and since it was the early 70s, they all had long hair, hence the name). The Mountain was supposedly converted from an old NASA missile crawler (that used to be used for Saturn Vs?) and had been seriously suped-up by the super-intelligent Hairies and a good dose of Kirby Tech. It spent its time roaring around (at extremely high speeds -- none of this 1 mph nonsense) the Zoomway, a private... well, miles-long racetrack is the only equivalent that comes to mind, giving off SFX of all sorts to discourage any curiosity on the part of the local commune of bikers in the Wild Area. The Mountain's outer shell made it look like some kind of giant monster on wheels, which helped add to the mystery surrounding it.


* ''Film/LiveFreeOrDieHard'' features an improbably big hacking center packed into a shipping container on the back of a tractor trailer. They do at least make it a little sensible, as the container is able to expand and contract to reasonable sizes to make it inconspicuous in city areas.
* ''Film/GoldenEye'' features the missile train, which while not that big, makes up for it in armor, length and sheer implausibly over-the-top goodness. Since the train was filmed in the UK and is a converted BR one, it's actually slightly too narrow due to a wider gauge of railway in the former USSR.
* From ''[[Film/ANewHope Star Wars IV: A New Hope]]'', the sandcrawlers that the Jawas tooled around in were bases on tracks. To a lesser extent, the Imperial AT-[=ATs=]. They were basically large troop-carrying assault guns, but various depictions showed them being capable of carrying speeders similar to the ones seen in ''Return of the Jedi''.
* ''Film/{{Ultraviolet}}'' includes a semi-truck apparently containing a spacious office, a two-story minimalist apartment, a supercomputer, a (literal) HyperspaceArmoury and sufficient equipment to fix the protagonist's motorcyccle. However, there is sufficient other usage of TARDIS technology that is one of the least jarring things about the film.
* The BigBad's military-style semi in ''Warlords of the 21st Century'' a.k.a ''Battletruck''.
* The ''Exxon Valdez'' is [[RecycledInSpace the boat version]] for the Deacon in ''Film/{{Waterworld}}''.
* In the Disney adaptation of ''Film/JohnCarter'' Zodanga is reinvented as a mobile city dragging itself across the surface of Barsoom by dozens of giant shovels strip-mining the planet as it goes.
* In ''Film/UniversalSoldier'', the titular soldiers are based in a large expanding shipping container on the back of a semi. Originally a non-villanous example, as it is part of an experimental US military program. Later on, though, it gets taken over by the BigBad.
* ''Film/DamnationAlley'' features the [=LandMaster=], a 12-wheeled amphibious APC which was a real working vehicle built for the film and is easily the best thing in the movie. [[PropRecycling It made several other appearances on screen]] before being bought by a private collector, but still makes the occasional appearance at California car shows.
* The titular vehicle of ''TheBigBus'', the nuclear-powered bus "Cyclops", was a 32-wheel double-decker articulated bus with 110 passengers, a bowling alley, a swimming pool, and many other luxury features for its non-stop cross-country journey.

* The ''Literature/WindOnFire'' books had the rival cities Ombaraka and Omchaka. These were driven by sails, and whenever they crossed paths they would attack each other by launching smaller 'land-sailers' at each other like torpedoes. Most of these intercept and destroy each other; actually scoring a hit on the other city is quite rare.
* Creator/DianaWynneJones's ''Literature/HowlsMovingCastle'' has the titular castle. In the book, how it moves is not explained, other than [[AWizardDidIt a demon does it]]. It's just a regular ol' castle that's made of irregular blocks of black stone, radiates chill and wanders across the landscape. (When Sophie first climbs aboard it's described as a ''very'' rough ride, suggesting it slides just barely above the ground and bounces against and over everything in its way.) In the [[Anime/HowlsMovingCastle anime]], it looks a steampunk version of Baba Yaga's chicken hut, with mechanical eyes and mouth and four chicken legs it walks around on.
** Ironically the house is smaller inside than outside. The large castle is mostly fake and [[InsurmountableWaistHighFence physically unreachable]] and just contains an external door which leads to Howl's real residence, a small house. (When Howl "moves" he takes the new dwelling and front door and adapts its surfaces and interior space to overlap his home's, resulting in his slightly-changed dwelling now occupying an additional location. Presumably this method makes his location hard to divine.) In the anime the house is in some sense inside the steam punk castle so there you can look out of a window to the moving landscape.
* Half the premise of Philip Reeve's ''Literature/MortalEngines''.
** While most of the mobile cities and towns move on giant wheels or treads, there are floating cities and even an airborne one. In fact, those who live in mobile cities think of people living in static cities as barbaric and backward. After all, it's only ''natural'' for cities to move across the landscape eating smaller cities and towns to survive.
* ''Literature/TheThrawnTrilogy'' - A non-villainous example [[http://starwars.wikia.com/wiki/Nomad_City is]] Nomad City from ''Franchise/StarWarsLegends''. It's a very large old ship carried by a large number of captured [[SpiderTank AT-ATs]], so it's sort of a base on legs. That's because it's a MercurialBase-- a mining station on a slow-turning planet very close to its hot sun, which would melt if left on the day side - as eventually happens once it is immobilized by an attack.
** The Literature/XWingSeries has Ysanne Isard's ''Lusankya'', a ''very'' CoolStarship. It's a Super Star Destroyer, sister ship to ''Executor'', but until it rises from where it's been buried under a city, the New Republic knows it only as a rumored secret prison where captured Rebels are [[BeingTorturedMakesYouEvil tortured]] and turned into {{Manchurian Agent}}s. It's big enough to do that and have a largish prison, whose population has no clue that they're not in a cave somewhere. After pulling free of the surface and causing mass death in the process, ''Lusankya'' becomes a sort of Base On Engines.
** [[spoiler: The city is actually Coruscant, the capital of the New Republic, and a City Planet! Given that Coruscant is the most densely-populated place in the entire galaxy, how it was buried and kept a secret is a mystery. Two possibilities were suggested in-universe: that Emperor Palpatine used his mastery of TheDarkSide to wipe everybody's memory of it, or [[FridgeHorror he just had all of the billion-plus witnesses killed]].]]
* Patrick Tilley's ''Amtrak Wars'' novels, set a long time AfterTheEnd, feature the Amtrak Federation, fighting an expansionist war out of Texas using giant "wagon-trains" that act as bases for troops and aircraft carriers for fleets of microlights. They're called the Amtrak Federation because they live in underground cities that were originally nuclear bunkers, connected by the "rail garrison" trains mentioned above, running on the Amtrak rail network. TruthInTelevision: The wagon trains are based on the [[http://en.wikipedia.org/wiki/Overland_train Overland Train concept]] tested by the U.S. Army.
* In Creator/IainBanks' ''Literature/ConsiderPhlebas'', the protagonist explores a military command bunker left behind by an extinct species that consisted of a nuclear-powered subway train, the theory being that by constantly moving around through a system of underground rail tunnels the enemy wouldn't be able to target it effectively with atomic weapons. It seems to have worked, to a degree, considering the system remains intact long after the war that killed off the species. However, it turns out they managed to make themselves extinct through biological warfare, making the whole grand set-up ultimately pointless.
* ''Literature/TheInvertedWorld'' - There was a very strange version of this in Christopher Priest's novel. A city moved slowly along on rails, which the inhabitants of the city were constantly busy building ahead of it and dismantling behind it, and rather than having motors driving wheels it used winches and cables to slide along. The city was forced to keep moving because the geometry of space was distorted, with the world "ahead" and "behind" them stretched into uninhabitable proportions and the safe zone of "normal" space was gradually moving relative to the surface of the planet. The city had to keep up.
* Similarly, [[http://periodictableofsciencefiction.blogspot.com/2009/09/mercury.html Mercury's entry in The Periodic Table of Science Fiction]] features Quicksilver City, which must constantly drive across Mercury's surface so as to stay at a human-habitable temperature. The road has (mostly) been prepared and seeded with supplies to pick up, by machines that can tolerate extreme heat and cold, but only at the border between night and day can people survive.
* ''Absolution Gap'', the last part of Creator/AlastairReynolds' [[Literature/RevelationSpaceSeries Revelation Space]] trilogy, has sections set on a moon where a whole religion has sprung up that involves giant mobile cathedrals constantly doing circuits of the moon without stopping. ItMakesSenseInContext (though there is far too much context to go into here).
* Taken to extremes in the backstory of ''Literature/TheBelgariad'', as detailed in the prequel book ''Belgarath the Sorcerer''. BigBad Torak is so determined to maintain his OrcusOnHisThrone status under any circumstances that he has his people build him an entire castle on wheels, pulled by a thousand oxen guided by a similar number of slaves.
* On both the film and movie versions of Creator/MichaelCrichton's ''Literature/TheLostWorld1995'', the expedition team to Isla Sorna utilizes a modified Fleetwood RV (called the "[[Literature/TheLostWorld1912 Challenger]] Trailers" on the novel) as a mobile expedition lab and base, with such things as integral motion detectors, tear gas launchers, a wireless connections to the computer systems that are still active on the ruined [=InGen=] labs on the island and a highly reinforced frame that can withstand a wide variety of punishment (up to and including dinosaur attacks). The Trailers and their integral devices see some more use on the novel, [[spoiler:including the rear trailer (which was the main supply carrier) surviving the T-Rex attack that wrecks the whole vehicle on the film and being used by the characters as a temporary shelter]].
* Idilithia of ''Literature/{{Calamity}}'' is an interesting variant on this trope. Buildings on one side of the city are constantly crumbling to dust, but the other side expands and grows new buildings at the same rate. So instead of moving like a car or train, it moves like a spot of mold moving across a piece of bread.

[[folder: Live Action TV ]]

* ''Series/ArkII'' had the good guys rolling around an AfterTheEnd landscape in a mobile home/lab/storehouse of LostTechnology.
* ''Franchise/PowerRangers'' / ''Franchise/SuperSentai'':
** ''Series/PowerRangersSPD'': SPD HQ is revealed about ten episodes in to be one of these, transforming into a sort of tank formation. Around the midpoint of the series we find it to be capable of ''intercontinental'' travel. It also turns into a giant robot, but that's a [[HumongousMecha different trope]]. The same obviously applies to parent show ''Series/TokusouSentaiDekaranger''.
** ''Series/PowerRangersNinjaStorm'' had a small mobile base in a tractor-trailer. It wasn't their ''real'' base with ''all'' their stuff, but it came in handy on several occasions.
** ''Series/PowerRangersZeo'' had a recreation vehicle that served as a base of operations for Rita Repulsa and Lord Zedd, after the Machine Empire chased them out of their actual base.
* ''Series/EngineSentaiGoOnger'' has an RV called the Ginjiro-go. [[BiggerOnTheInside It's surprisingly roomy.]]
* ''Series/TheWildWildWest'' had a train (complete with a steam locomotive) filled with gadgets and spy-equipment, as an operating base for the heroes.
* The 80s ''Series/KnightRider'' series had a truck which KITT would periodically drive into for repairs and upgrades.
* UNIT has an HQ on wheels that is featured in the ''Series/DoctorWho'' episodes "The Sontaran Stratagem" and "The Poison Sky".
** The Sand Miner in "Robots of Death" is probably big enough to qualify as well.
* Jim Rockford on ''Series/TheRockfordFiles'' both lived in and worked out of a old, dilapidated mobile home, which usually remained parked on a Malibu beach, but on a few occasions, when he needed to skip town in a hurry, he hitched his trailer up (with the help of his retired trucker dad) and took home with him.
* A {{Downplayed}} and heroic example is shown in ''Series/NCISLosAngeles'' with a mobile NCIS team that uses what is essentially a tricked-out semi.
* Walter White and Jesse Pinkman's RV/meth lab on ''Series/BreakingBad''.



* The music video for "Army of Me" by Music/{{Bjork}} features a tractor trailer so large that the wheels themselves are taller than most people.


[[folder: Tabletop Games ]]

* ''TabletopGame/{{Eberron}}'' has Argonth, which patrols the border of Breland. Though it's not on wheels so much as it [[{{Magitek}} hovers]]. Argonth has sister-fortresses, but one was destroyed during the Last War, and the other is only known to exist, not what its name is or what Breland actually does with the fortress.
* In ''TabletopGame/{{Warhammer 40000}}'', we have:
** Titans are base, cathedral, and killing machine all in one, all on legs.
** Super-heavy tanks such as Baneblades. When a tank is so big that firing all weapons on the damn thing can only be described as a ''broadside'', you have a base on wheels.
** The monastery-fortresses of the Iron Hands space marines are literally (massive, massive) Bases on Wheels.
** An let's not forget the Necron's Monoliths. Which are less Bases on Wheels and more mobile floating (and teleporting) tombs of death and destruction.
** And the Imperial Leviathan which is a giant mobile command center on wheels
** The Capitol Imperialis. Essentially it's a huge troop carrier, exept that instead of infantry, it carries companies of ''tanks''. Also works as a mobile command center and is armed with something called a [[{{BFG}} "Doomsday]] [[NamesToRunAwayFromReallyFast Cannon"]]
** The Chaos airbases in Creator/DanAbnett's ''Double Eagle'' are over a mile long, and mobile.
** And the 'Spike' from [[Literature/GauntsGhosts Necropolis]], a kilometer tall tracked spire mounting a normally spacecraft based weapon capable of cutting a ''Fortress'' in ''half''
** There's also the [[CanonDiscontinuity Squats]], a now [[RetCon abandoned faction]] that specialised in this trope. Land Trains, the Colossus, the Cyclops...
** And the role-playing games in the setting give us Ambulon, the wandering city (well, that's a city-sized Base On Legs, but close enough), and the hive-ships of Zayth, which are tracked megalopoli carrying ridiculous amounts of (occasionally starship-scaled) weaponry, used to battle other hive-ships for resources
* TabletopGame/DungeonsAndDragons 3E ''Great Wheel'' cosmology has the Crawling City in Gehenna, the capital city for the fiendish Yuggoloths
** The demon prince (and Patron of Gnolls) Yeenoghu has a palace on rollers that is endlessly dragged around his domain by hordes of slaves.
** The ''Dragon Magazine'' description of Baba Yaga's Dancing Hut fits this trope, probably more so than the original Russian myth, because the cottage on chicken legs is really a PocketDimension on chicken legs.
* The d20 worldbook ''TabletopGame/DragonMech'' has entire societies living in HumongousMecha, from two man human powered walkers through 50 foot high clockwork or steam powered ones up to city-mechs carrying thousands of people and fleets of the smaller mechs.
* In ''TabletopGame/{{Rifts}}'' the [[PuttingOnTheReich Coalition States]] have the Firestorm Mobile Fortress.
* In ''TabletopGame/AllQuietOnTheMartianFront'', the best weapon against the invaders forces on the [[InvadedStatesOfAmerica American Front]] has been the Land Ironclads, massive [[SteamPunk steam-powered destroyers built onto treads]].
* The ''TabletopGame/StarWarsD6'' by [=WestEnd=] Games had as one of the land vehicles used by the Galactic Empire a mobile, tracked, command vehicle. While lightly armed, it had strong shields and heavy armor but was not meant to enter battle.
* ''[[TabletopGame/{{Cyberpunk}} Cyberpunk v3.0]]'' had Road Cities that (somehow) came around after biker gangs became extremely popular, with campers and caravans eventually being traded for this trope. The faction in-game is known as the Rolling State.
* ''TabletopGame/RocketAge'' has Red-Blue Chanari caravans. These are huge structures, ten meters long, eight wide and six high, designed to cross the deserts of Mars. Moved by the combines muscle power of four bull ulodonts inside the base of the structure, the entire thing weighs hundreds of pounds and uses six gigantic stone wheels for stability. The entire thing is essentially an armed BambooTechnology sand crawler.
* In the post-apocalypse cyberpunk, supernatural horror game ''Obsidian - The Age of Judgement'', the Law agency has two types of tank-like, mobile bases. The first is the Precinct. It's a 40 feet wide and long, there are 6 armoured police cars and over 30 officers inside and it houses offices, a detox lab, an advanced sensor suite, 10 holding cells and a ton of guns for the men inside. The Precinct is also heavily armoured and packs a lot of autocannons, caught between the Precinct's weaponry and the troops within, most enemies end up getting slaughtered against it. The second is the much rarer but vastly more powerful Executioner, of which there are only 4. The Executioner dwarfs the Precinct, coming in at 150 feet long and 50 wide. It carries 10 of the cars that the Precinct has and has a crew of over 45 officers. Inside there twenty living quarters, a detox lab and a science lab, 5 holding cells plus 1 extra-large cell for holding gigantic demons, a gym room and a galley. The Executioners are nearly invincible being extremely well-armoured and armed to the teeth, and in almost a century of service, they have successfully destroyed or driven off the vast majority of demonic incursions encountered - including those by demons the size of mountains.


* ''{{Transformers}}'': any and all [[http://tfwiki.net/wiki/Cityformer "cityformers"]] are colossi who turn into Transformer-scaled cities or fortresses, though scale in Transformers has traditionally been [[YourSizeMayVary utterly screwed]]. Their ranks include Metroplex, Trypticon, Fortress Maximus, Scorponok, Overlord...
** Metroplex, the Transformer who doubles as ''a massive mobile city''.
** Also, Trypticon, who is less a Base On Wheels and more a Base On Legs, as he transforms from a city into a giant robot dinosaur. [[note]]There are actually several city-robots in the original ''Transformers'' continuity, although no more have shown up since.[[/note]]
* Creator/{{Kenner}}'s ''Megaforce'' toyline was based around gigantic vehicles, with almost all of them qualifying for BaseOnWheels status. The biggest examples were the V-Rocs Thorhammer, a massive wheeled ballistic missile launcher with a skyscraper-sized missile, and the Triax Goliath, a crawler that could unfold into an entire frontline base.
* During the late 80s and early 90s, ''Franchise/GIJoe'' had a whole series of these; probably the most well-known was the Defiant space shuttle launch complex, and there was also the Rolling Thunder mobile ballistic missile launcher and GI Joe's aptly named Mobile Command Centre.
** ''Film/GIJoeTheRiseOfCobra'' also got a mobile version of the Pit (the Joes' underground base) in the toyline and videogame.
* Franchise/{{LEGO}} has the theme Nexo Knights, in which the Fortrex set is essentially this.


[[folder: Video Games ]]

* Almost every entry in the ''Franchise/AssassinsCreed'' series features at least one main base where the assassins Brotherhood keeps their arsenal, armors, coordinates their members and trains their recruits-- in ''VideoGame/AssassinsCreedSyndicate'', rather than use a building, the Frye twins take over an enemy gang's private *train* as their base of operations. "Bertha" serves as a hideout, living quarters, even letting the player upgrade their gang and collect tax money from within. It also runs around London of course.
* ''Franchise/JamesBond: VideoGame/EverythingOrNothing'' features both the tractor trailer and train variants of this trope: early in the game, you have to board a train (an homage to the one from ''Film/GoldenEye'') which is so large that it has to straddle two separate tracks). Later, Jaws transports the nanotech to New Orleans in a tractor trailer so tall that it ploughs straight through other traffic and, of course, a toll booth.
* The {{Eagleland}} and DirtyCommunist "Recyclers" and factories in ''VideoGame/{{BattleZone| 1998}}'' are basically giant hovering... factories. They can fly around, deploy on a geyser, crap out a couple units and pack up and move along. The sequel switches the Recycler to tracked propulsion and allows it to deploy anywhere flat, but makes deployment permanent; it can't pack-up mid-mission.
* The G-1 Mobile Bases from ''Franchise/CodeGeass'' are a fairly typical example.
* The ''VideoGame/CommandAndConquer'' series has the Mobile Construction Vehicle, which is basically a vehicle that can transform into a Construction Yard and then build bases. Depending on game, mode and options,[[note]]It's often unavailable in the campaign, but an available option in multiplayer - one which most players don't take advantage of anyway, when they can instead build a wall around the construction yard to prevent enemy engineers from just taking it[[/note]] it can sometimes also pack up and leave when needed.
** ''VideoGame/CommandAndConquerTiberiumWars'': GDI's MARV, which eats entire Tiberium fields at a time, has enough space for a platoon of infantry to garrison inside, and is armed with ''three'' gigantic [[strike:railguns]][[DepletedPhlebotinumShells sonic shockwave shell cannons]].
** The Empire of the Rising Sun in ''VideoGame/CommandAndConquerRedAlert3'' have enormous ocean fortresses that maintain and house entire armies by themselves, in addition to significant defenses. You attack or defend one of these things depending on which campaign you play.
** In ''VideoGame/CommandAndConquerTiberianTwilight'', each player has a "crawler"; a giant walker, tank, or airship (depending on class) that has production facilities for units (and base defenses for the defense class), plus a ton of weapons on it. Meanwhile, base building has been mostly removed.
** The ''Firestorm'' expansion to ''VideoGame/CommandAndConquerTiberianSun'' introduced mobile factories. They serve as a war factory after being deployed, and can be packed up again to move to another location.
** The ''Yuri's Revenge'' expansion for ''VideoGame/CommandAndConquerRedAlert2'' applies the same idea to mining with Yuri's "Slave Miner", a vehicle that - rather than gathering ore itself and returning it to a refinery like the other factions - deploys itself near a patch of ore and sends out slaves to mine it. The individual slaves carry much less ore than the other miners can, but the turnaround between heading out, mining, and returning their payload to the refinery to be processed is much shorter, especially since the refinery can just be relocated to a fresh patch of ore after mining an area clear, especially allowing for fast cash when they can find the more valuable gems.
* In ''VideoGame/DragonQuestHeroesRocketSlime'', the {{magitek}} tanks used in tank battles are mostly castles built on top of NASA crawlers. Each one has two floors and a fairly substantial interior volume.
* ''VideoGame/DroneTactics'' has one of these. It's a giant robotic snail with a cannon hidden under a hatch in its shell, which [[RuleOfCool justifies the use of this trope all by itself.]]
** Too bad the Snail practically dies in one hit in later levels, and the cannon it uses hardly dents the enemy hp, though you can buy upgrades to mitigate this.
* ''VideoGame/EnemyTerritoryQuakeWars'' features a relatively small example, the MCP. It's a base/missile silo on tank tracks, and not too much harder to kill than most vehicles.
* ''VideoGame/{{Fallout 3}}'' has the Enclave's Mobile Base Crawler, a treaded vehicle spanning 3 floors and is large enough to house a mainframe, a complete barracks, an armory, and even a radar dish to activate a weapons satellite. And probably, as this is the ''Fallout'' universe, a nuclear reactor powering all this. Of course, this 'verse has nuke reactors powering ''[[EveryCarIsAPinto cars]]'', so that's not necessarily that remarkable.
* ''VideoGame/FrontMission'' has the Chinese Tianlei Mobile Fortress. Yes, ExactlyWhatItSaysOnTheTin, housing many [[HumongousMecha Wanzers]], helis, and home to the enigmatic Imaginary Number special forces. Depending on your scenario, you either try to take it down, or defend it.
** GaidenGame ''[=Gun Hazard=]'' features Galeon, a pretty much textbook example of the BaseOnWheels. It's also bigger inside than it is outside. Galeon hurtles around the desert at a pretty impressive pace given it's size (presumably relying on the frequent sandstorms to cover it's tracks) and is protected by numerous gun turrets. It also houses a small army of enemy [[HumongousMecha Wanzers]], of course.
* The British faction in ''VideoGame/CompanyOfHeroes'' has mobile [=HQs=] (Bedfords with extra seats for the commanders). They can be moved anywhere, sometimes even at an incredible speed, but in return, the British cannot promote civilian buildings to [=HQs=] unlike every other faction.
* ''Franchise/{{Halo}}'':
** Featured in the ''VideoGame/{{Halo 3}}'' multiplayer map "Sandtrap" are two vehicles officially called "''Behemoth''-class Troop Transports", colloquially known as "Elephants". While small examples of the Base On Wheels trope, they are the largest pilotable vehicles in the game. On default map settings, they come equipped with two detachable Gatling gun turrets and one fixed turret. They can also hold up to three ATV or two "Warthog" jeeps. In-universe, they were designed for troop transport and vehicle recovery, featuring large cranes and an upper and lower deck. However, in a few fan-made multiplayer modes, they are used as mobile flag-bases in Capture the Flag games. Amusingly, you can actually flip one over, though it is very hard to do. Even more amusingly, you can then go to flip it back over, leading to a prompt; "Press RB to... [[EasterEgg Wait, what? How did you do that?]]"
** In RTS-spinoff ''VideoGame/HaloWars'', the Elephant is a pretty literal base on wheels, since you can use it to spew out a never-ending stream of infantry.
** ''VideoGame/{{Halo 4}}'' takes it up to eleven with the Mammoth, which dwarfs the Elephant (while also moving considerably faster than its slow-as-molasses little predecessor), can comfortably hold two or three Warthogs along with plenty of soldiers & guns, has top-mounted rocket turrets, and has a mini-MAC as its primary armament, capable of one-shotting Phantoms and (according to its specs) hitting targets in orbit. Basically, the Mammoth is the UNSC's answer to the Covenant's [[HumongousMecha Scarab]].
* ''VideoGame/{{Haze}}'' has a land aircraft carrier as Mantel's base of operations, though given talk of the setting change and the obvious difference in detail between the upper and lower sections, it was probably originally supposed to be an ordinary carrier.
* The Grindery in ''VideoGame/LunarTheSilverStar'' is a giant castle that doubles as an even-more giant tank, and it's one of the Magic Emperor's favorite killing devices.
* ''VideoGame/MarvelUltimateAlliance'' featured the Omega Base, a giant military research station on tracks operated by S.H.I.E.L.D. The only plot reason it was on tracks was to have the villains hijack it and send it towards an hydroelectric dam.
** The mission before involved the [[AirborneAircraftCarrier Helicarriers]] prompting Spiderman to wonder why they didn't add a tunnel to Japan to the extravagant waste two such vehicles would produce.
* Most Terran Buildings in ''VideoGame/StarCraft'' are mobile, though they fly rather than moving on the ground and have to land to produce units.
* In early press releases for ''VideoGame/StarCraftII'' it was stated that the Terran's [[HumongousMecha "Thor"]] unit would be built by [=SCVs=] like buildings, making it kind of a base on legs. But that idea was eventually scrapped and instead it is built by factories like every other land vehicle.
** Then there's also the joke unit Terra-Tron, which is quite literally a base on legs. (It's formed by combining every building in the base into a giant robot.)
* ''VideoGame/SupremeCommander'' has the Fatboy experimental unit. It's as large as several city blocks and can quickly produce most ground units while (not) firing away with its twelve gauss cannons, two riot guns, four railguns and torpedo launcher. It needs the torpedoes because it's amphibious, simply driving along the sea floor.
* ''VideoGame/{{Transarctica}}'' casts you as the commander of a CoolTrain-Base in an ice-covered AfterTheEnd world. As you expand your train, it will come to include everything from troop transports, luxury-cars for spies, heavy weapons for anti-train combat, a [[ThisIsADrill huge drill]] on the front, and of course the Mammoth transport cars. No, not some kind of tank or mech called a Mammoth, literal, woolly, betrunked Mammoths, used as beasts of burden.
* ''VideoGame/ShinMegamiTenseiStrangeJourney'' - Your main base of operations is practically a Base on Wheels. It's capable of flying, but mostly it rolls around on its huge wheels, so it qualifies more for this trope than ''CoolAirship.'' It's got sickbays, laboratories, and all sorts of other doo-dads necessary for analyzing world-destroying vortexes.
* [[WhatCouldHaveBeen Most likely]] what the Train would be in ''VideoGame/RedDeadRedemption'' if it was present in Multiplayer.
* In ''VideoGame/MegaManZero 4'', LaResistance uses a convoy of moving vans as a mobile base when they need to make a long trip away from their usual base.
* In ''Videogame/GardenGnomeCarnage'', the player controls an apartment building mounted on wheels.
* The Echidna (basically, a [[VideoGame/ValkyriaChronicles Batomys]] mk.2) in ''VideoGame/ValkyriaChroniclesIII''. Always ThatOneBoss whenever it appears.
* The final boss of ''Videogame/SpyHunter 2'' for the Playstation 2.
* The final boss of ''VideoGame/SeriousSam 2'' is Mental's headquarters, Mental Institution, a ''gigantic'' moving pyramid complete with cannons (that shoot ''depleted uranium projectiles''), rocket turrets, fireball launchers, and hangars that deploy fleets of Fatso Fighters and Seagull Bombers.
* Non-militarized example: ''VideoGame/KerbalSpaceProgram'' allows you to build some rather large vehicles. Almost any surface-based craft can be a Base On Wheels if it has both rover wheels and a crew pod or habitation unit of some kind.
* Mission 5 of ''[[VideoGame/{{Commando}} Mercs]]'' culminates in a BattleshipRaid with an armored train.
* A non-militarized example in the InteractiveFiction ''VideoGame/EightyDays'' with the entire city of Agra. Basically, imagine the Taj Mahal and its surrounding environs on several massive {{steampunk}}ish legs periodically walking throughout India. It's even mentioned that the political status of the city is being contested, as the Brits claim that it's part of UsefulNotes/TheRaj, while the rest of the peninsula claims that, since Agra sometimes wonders into their territory, it can't be a British holding. In-game, it actually counts as a mode of transportation on one particular route. On the top, you have the gardens and the majesty of the Taj Mahal. Below decks, you have the steaming and clanging underbelly where thousands of multicultural workers live and work, ensuring the safe operation of the walking city (naturally, lots of big levers and valves).
* The Roving Clans of ''Videogame/EndlessLegend'' build their cities on the backs of massive Setseke beetles the size of a city block. Under most circumstances, the beetle hibernates as the Roving Clans peddle their wares and build, but in times of change the citizens can awaken the beast ("Setseke, ho!") and set off. While in motion, the city generates food, influence, [[PracticalCurrency Dust]] and science, but cannot build anything. The beetles are surprisingly agile for their sheer size, having the same 4 movement points as most infantry units.
* ''[[VideoGame/UFOAfterblank UFO: Aftershock]]'' had the Laputa base, as well as its airborne variant, the Flying Fortress.
* ''VideoGame/TeamFortress2'' has the Carrier Tank.
* In ''Videogame/MechWarrior 3'', a Mobile Field Base often tags along with your lance of [[HumongousMecha BattleMechs]] which has the capacity to repair them on the field, but is slow and unarmed. The MFB was slated to appear in ''Mechwarrior Living Legends'' but never made it in due to a [[ScrewedByTheLawyers legal row]].
* On ''Videogame/{{Subnautica}}'', the player has the capacity to construct the ''Cyclops''-class submarine, which is large enough to hangar a mini-sub and multiple closets for holding resources and equipment, plus Constructers and Equipment Tables for on-the-move creation and upgrading of said equipment. It even has a little free space for the player to make a cabin, a workshop or even a small garden.
* The ''Rising Tide'' DLC for ''VideoGame/CivilizationBeyondEarth'' introduces aquatic cities. These cities are able to slowly move to an unoccupied adjacent hex after a certain project is completed. This is also how they claim territory (unlike land cities, which use culture). The North Sea Alliance specializes in these kinds of cities.
* In ''VideoGame/HomeworldDesertsOfKharak'' the Northern Coalition uses as bases carriers that look like nothing so much as aircraft carriers on wheels, acting like the Mothership in the original ''VideoGame/{{Homeworld}}'' games. While the Kiith Gaalsien have carriers that hover.

[[folder: Western Animation ]]

* ''WesternAnimation/InvaderZim'' - Zim's house becomes a Base On Wheels when GIR becomes the computer AI.
* ''WesternAnimation/{{Metalocalypse}}'': Dethklok's tour bus qualifies as one of these. It takes up the entire road and has a large lavishly furnished room inside with both a hot tub and a two story tall fireplace with a balcony across it.
* The Technodrome in ''[[WesternAnimation/TeenageMutantNinjaTurtles1987 Teenage Mutant Ninja Turtles]]''. Powering the Technodrome was frequently a sub-plot to the enemy's motives and it spent a lot of the series stuck in inconvenient places.
* Megatron's constant energy-stealing in ''Anime/TransformersRobotsInDisguise'' wasn't so he could power his doomsday base so he could destroy the Autobots, but simply so he could keep it moving around so the Autobots wouldn't find it. One wonders why he bothered with it in the first place.
* The BigBad of ''WesternAnimation/{{Wakfu}}'' has one. Guess what it's shaped like. Come on, guess what [[TimeStandsStill the time guy's]] fortress is [[http://static.tvtropes.org/pmwiki/pub/images/1504-01_6741.jpg shaped like.]]
* ''WesternAnimation/JayceAndTheWheeledWarriors'' has the Battle Base, which is part of Herc Stormsailor's space barge the Pride of the Skies II.


[[folder: Real Life]]
* Due to the diverse requirements of simultaneously organizing an army and fighting a war on multiple fronts, Leon Trotsky famously utilized one of these (the ''Revvoyensovet'') as a mobile command center staffed with an [[PraetorianGuard elite guard]] during the Russian Civil War, moving from front to front in order to take local command, shore up morale, and ensure local organization and structures were in place to support the Red Army.
* A typical example of an armed train would be the German setup for hauling the giant Krupp K5 280mm railway guns; each battery had three trains. The staff train would comprise around 34 cars including two locomotives, the whole train being over twelve hundred feet long and including a field kitchen, flatbed cars for vehicles, AA guns, an equipment car, generators, and even a mobile workshop. The gun trains were a little shy of a thousand feet long and had 23 or 24 cars including two locomotives, and included the K5 guns themselves, cranes and parts to build turntables for the guns to be mounted on, three boxcars of ammunition and more AA guns. The shorter gun train had two boxcars dedicated to the battery's armourer, the longer an extra passenger car and a wagon of food.
* Projekt NM was a "mobile coastal battery" consisting of three Tiger tanks with their turrets mounted on a giant I-beam girder frame with a false wooden building on top, with the whole thing placed on top of their hulls which would drive the bizarre contraption around. It never got off the drawing boards.
* ThoseWackyNazis had plans to create versions of their heavy railway guns that ran on tank treads; the one the came closest to actually happening involved the 210-ton Krupp K5 guns, of which there were 25 by the end of the war. The plan was to replace the two rail cars with modified King Tiger hulls. Far more ridiculous was a similar plan to make a self-propelled variant of the 1,400-ton Schwerer Gustav ultragun, which was supposedly on the drawing boards when Albert Speer found out and made the engineers involved go and work on something sensible.
* On a smaller scale, Hitler's first headquarters was a train. It was fifteen cars long and required two engines working in tandem. Part of the reason Hitler initially opted for a train was that if France decided to attack the German border during the invasion of Poland, they could quickly transfer the command staff to the west.
* Perhaps the ultimate BaseOnWheels would have been the "Midgard-Schlange," a proposal made by German designers in the 1930s for a 60,000 ton armoured train the better part of two thousand feet long, which would run on tank treads and could drill underground or run on the bottom of the sea. It would supposedly have been used to drill under fortifications and set huge explosive charges to destroy them. The project never seems to have passed the "asking for funding" stage, though it says a lot about Nazi Germany that this was due to lack of resources and manpower rather than, say, because it was an ''utterly fucking ridiculous'' idea.
* Armoured trains were used by the Russians and Germans during the Second World War to deter vehicles and infantry from attacking vital rail lines; they had purpose-built armoured wagons and sometimes armoured locomotives, and their armament included machine guns, AA guns in armoured enclosures, artillery guns, and even surplus tank turrets. The armoured trains only got bigger, stronger and meaner as the war went on; perhaps the ultimate example was when the Allies found three Panzerjäger-Triebwagen wagons (51-53) in a German factory after the war ended, each essentially being a heavily armoured mobile bunker equipped with a pair of Panzer IV turrets.
** Well, the two most advanced Soviet battletrains boasted [[http://content.wargaming.net/numbers/kost/train/23/img/9.png that]], and then a few [[MacrossMissileMassacre Katyusha rocket laucnhers]].
** An armoured train proper would constitute about a third of the total unit, with the rest being the ''actual'' mobile maintenance and quartering facility.
** There was also that little matter of [[CoolVsAwesome the battle between the trains]] ''[[CoolVsAwesome Ilya Muromets]]'' [[CoolVsAwesome and]] ''[[CoolVsAwesome Adolph Hitler]]''.
** The Soviets resurrected their armoured trains in the 60s to guard their border against UsefulNotes/ChineseWithChopperSupport. The new versions sported [[MoreDakka 23 mm quad turrets]] and carried - [[AwesomePersonnelCarrier CARRIED]] - several complete T-62 tanks to chase the fleeing enemy down away from the track.
** The local conflicts in Yugoslavia and Chechnya caused armoured trains to reappear once again.
* While the missile train in ''Film/GoldenEye'' might have been over the top, the concept of a missile train is one based on RealLife:
** The earliest examples were the German prototypes for a train-launched A4 (ie V2) missile. These were extensively tested but ultimately abandoned after it became clear Allied air superiority would make them unworkable. Most V2 missiles were still moved from the factory to their launch sites by train, however.
** In the USA, the [=LGM-118A=] Peacekeeper, initially known as the "MX missile", was proposed to be deployed by a "rail garrison" system whereby 25 trains, each with two missiles (up to 10 warheads), would use the national railroad system to conceal themselves. When the UsefulNotes/ColdWar ended, this was deemed too expensive and the missiles were stuck in silos.
** 56 RT-23 Molodets/SS-24 "Scalpel" Soviet and later Russian missiles were rail-based. A typical set of missile launch trains were comprised of two locomotives, followed by generating power car, command car, two support cars, and three missile launch vehicles, with a total of nine-car train set. All of them are reportedly now decommissioned.
* The world's heaviest truck is the Liebherr [=T282B=] mining truck, a giant dump truck 50 feet long, 26 feet tall and 22 feet wide, weighing in at 224 tons empty and with a maximum operating weight of 653 tons. With 3,650 horsepower from an 11.5 ton engine, this monstrosity can still manage a respectable 40 miles per hour.
** It has since been beaten by [[TheRival their main rival's]] newest entry, a 360-ton [=BelAZ=]-75710, which can carry 450 metric tons (500 short tons) of ore at the same top speed of 64 kph with its two 2,300 hp engines.
* Since at least the Apollo era, NASA has relied on one of two diesel-electric [[https://en.wikipedia.org/wiki/Crawler-transporter Crawler-Transporters]], several stories in height, to transport the vehicle assembly from the Assembly building to the launch pad; these are the largest self-propelled vehicles in the world, weighing 2,400 tons. They require their own path that is 7 feet thick (largely due to having a tiny tread area relative to their size) and move at a top speed of two miles per hour, though they can only manage one with a shuttle on top. It takes a team of almost 30 engineers, technicians and drivers to operate one of those behemoths.
* Bucket-wheel excavators are the largest mobile objects on Earth, though they cannot move under their own power and require an external generator to supply electricity. The biggest, Bagger 293, requires 17 megawatts of power and weighs in at 14,200 tons - almost 50% heavier than a ''Ticonderoga''-class cruiser; in one day, either Bagger excavator can strip enough material to fill 2,400 coal wagons. They only move at 0.4 miles per hour, but their ground pressure is just 24.8 PSI: that's significantly less than a ''car''.
** One of Bagger 293's similar-sized siblings has been praised in a [[http://www.youtube.com/watch?v=azEvfD4C6ow popular music video]].
* The French "Bulldozer King," Edmond Nussbaumer, has built a three-story, 200 ton home on top of an enormous bulldozer. It even has a 360 degree rotating platform.
* Though not usually military, some people do live out of their vehicles for significant periods of time, or even indefinitely. Their standards of living tend to vary, depending on the size and quality of the vehicle.
* While tiny by the standards of the trope at just 20 to 30 tonnes, the [[http://www.morozov.com.ua/images/att-bas-3l.jpg Kharkovchanka]] [[http://lurkmore.so/images/thumb/5/58/Kharkovchanka-2.jpg/300px-Kharkovchanka-2.jpg series]] of snow vehicles were truly [[http://blog.nuestroclima.com/wp-content/uploads/2008/11/kharkovchanka.jpg houses on tracks]], having facilities for sleeping, eating, bathing and toilets. The [[RedsWithRockets Soviets]] built them in the [[TheSixties early 1960s]] using T-54 tank running gear for [[http://www.southpolestation.com/trivia/igy1/dralkin1.jpg Antarctic exploration]].
** Rather unexpectedly, the wagonlike layout of first Kharkovchankas, initially selected for the ease of the engine maintenance from the inside of the heated cabin, turned out to be impractical. Because of the rather cramped space inside the engines turned out to be difficult to reach to fix and maintain, they ran too hot, as the small engine compartment made the proper cooling difficult, and they released the diesel fumes into the living spaces to boot. This is why the second series moved the engine outside, under the more traditional hood, where it turned out much easier to fix and cool, at the expense of the necessity to leave the vehicle to do so.
* There are documented reports of Chinese rulers building massive wooden fortresses that would float and could be dragged up rivers. Instead of having to find raw materials and build the fortifications on site, the fortress could just be moored and was instantly ready for service, being no more vulnerable than a regular wooden fort.
* A number of very mundane versions exist, where a largish vehicle such as a truck, van, or bus is equipped as a mobile command center. Armored military vehicles meant to be mobile command units may include a fake gun to make it harder for the enemy to [[ShootTheMedicFirst single them out]] in combat, the space used to support the weapon and its ammo being used instead for communications equipment and sensors.
* Even more mundane is the fact that many stationary bases can be made entirely out of "containerized" buildings. Field kitchens, latrines, showers, command posts, etc. that are designed to be folded up into a shipping container for easy deployment, although many of these have to be rendered stationary to serve their designed purpose[[note]] Not entirely unlike the Mobile Homes that don't go anywhere in ''Film/TheLastStarFighter''[[/note]].
* While discussing the mundane side of this trope, Its worth mentioning that large airplanes can act as mobile command centers and troop/ vehicle carriers. They don't need to land in order to give orders but some have features that will let them become temporary command centers on the ground (the ability to easily take power from an external source or antennas that normally couldn't be extended during flight). The later version is technically a base on wheels because airplanes have wheels (duh) and can be wheeled around to cover minor distances (for major distances they can simply fly).
* The Mongols were famous for having these. During their quest for world conquest in the 13th century, several Mongol gers would be mounted with gigantic wheels and towed by draft animals across vast terrain and served as a mobile base of operations.
* Possibly the simplest form of this trope would be a vehicle equipped with a radio or other communications equipment (such as a police car or a military truck). While this is rather limited in terms of how much you can base out of a single vehicle (capacity: A handful of people and a few hundred pounds of cargo for a typical car), if you use multiple vehicles in a convoy, then you effectively have this trope for as long as they travel together.
* The President of the United States has custom-built aircraft [[https://en.wikipedia.org/wiki/Boeing_VC-25 Boeing VC-25]], the one commonly perceived as "Air Force One" and [[https://en.wikipedia.org/wiki/Boeing_E-4 Boeing E-4]] to serve as flying command posts for the nation's military.