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->''"I fear that all we have done is to awaken a sleeping giant and fill him with a terrible resolve."''
-->--[[BeamMeUpScotty Attributed to]] '''Naval Marshal General Isoroku Yamamoto''', after the attack on [[UsefulNotes/WorldWarII Pearl Harbor]]

Everyone knows about the BigGood and the BigBad, but what about the Even Bigger Neutral?

In most conflicts, there are a variety of neutral parties. From the {{Precursors}} to the RetiredBadass to the KingInTheMountain to the HiddenElfVillage, they always exist, and there's usually one that can [[CurbStompBattle flatten]] [[MeleeATrois both the other sides at the same time]], [[CherryTapping using only a kitchen whisk and a sheet of tissue paper]]. But don't bother asking them for help, because [[ObstructiveCodeOfConduct they will refuse to get involved]].

That is, unless someone does something [[IdiotBall stupid]] or [[MoralEventHorizon evil]] enough to repulse them. Whether it was the heroes or the villains, anyone who steps over some inexcusable line will invite their wrath, and this isn't the regular NeutralNoLonger give-the-other-side-some-reinforcements wrath ... this is "we have an army of Cthulhu clones" wrath. Expect an OhCrap from the receiving end if and when the former neutrals start whipping out the [[FantasticNuke doomsday weapons.]] On the other hand, for the beleaguered side ''not'' subject to the proverbial giant's wrath, this is a moment of celebration as they gain a powerful ally and they will [[YouAreNotAlone fight alone no more]].

There are two key points to look for before and after this trope comes into play.
* Before: There is an established conflict, of any sort, between any number of parties, with a prominent neutral party that wishes to remain uninvolved.
* After: When the neutral party enters the conflict, it drastically alters the balance of power.

A SubTrope of NeutralNoLonger and related to HeroicNeutral. May serve as a DeusExMachina and/or StoryBreakerPower (and/or GameBreaker, if the work is a game) if the giant was an AllPowerfulBystander. Compare DefaultToGood. If the entity is an individual, then they won the SuperpowerLottery, and it's likely they are a MartialPacifist. Compare SealedGoodInACan, if the "sleeping" is in the character of an involuntary confinement and someone breaks the prison. If the neutral party is actually ''smaller'' than the two fighting powers, but still enough to alter the balance of power greatly, this overlaps with KingmakerScenario.



[[folder: Anime & Manga]]
* The Flying Pussyfoot arc of ''LightNovel/{{Baccano}}!'' would already have been [[GambitPileup a clusterfuck]]: A cult, a bunch of AxCrazy mafia goons, and a gang of delinquents were all planning to attack the train, which also happened to be carrying three immortals, the wife and daughter of an influential senator, and a [[BadassBystander surprisingly badass]] agent of ''[[KnowledgeBroker The Daily Days]]''. However, one of those mafia guys made a huge mistake: he killed the elderly conductor Tony, then tried to kill a [[spoiler: younger conductor when he found out]]. Unfortunately for him, his would-be victim was [[spoiler:Claire Stanfield]], a [[CharlesAtlasSuperpower nigh-unstoppable]], AxCrazy, CrazyAwesome {{badass}} ProfessionalKiller and TortureTechnician who did not appreciate someone murdering his mentor. [[{{Gorn}} Carnage ensues]] as the Rail Tracer makes its merry, blood-soaked way up the length of the train.
* In ''Anime/MobileSuitGundamSEEDDestiny'', Durandal attempts to kill the retired Kira Yamato and Lacus Clyne so they don't get in the way of his plans. This alerts them to his evil intentions several months before anyone else on earth suspected a thing, causing them to take the Freedom, Archangel and Eternal out of storage, which all become instrumental in his defeat.
** As a matter of fact, near the end of the series Kira himself says "If not for that attack, we probably would have gone along with anything Durandal wanted."
* This was Celestial Beings plan to acheive world peace in ''Anime/MobileSuitGundam00''. If a large scale military conflict ever erupted, they would show up and [[CurbStompBattle decimate both sides.]] The idea is too discourage war by ensuring that everyone loses, and then to bring unity by [[EnemyMine becoming the common enemy of all military powers.]]
* In ''Manga/OnePiece'', we learn that the second half of the Grand Line, called the New World, is controlled by four pirates of immense power. These four are known as the ''Yonkou'', or Four Emperors, and that giving one of them grief is basically an act of suicide. [[spoiler: following the TimeSkip, the Worst Generation, made up of the super-rookie pirate crews that were on Saobondy the same time the Straw Hats were, is making waves by doing just that.]]
** Whitebeard, The WorldsStrongestMan and former equal of the Pirate King., is acknowledged in-universe as a CoolOldGuy who just wants to chill on his ships. But when the World Government announces their intention to publicly execute one of his men, the world panics because Whitebeard is AFatherToHisMen, and that the Government has basically declared war on a man who can ''create earthquakes at will.''
** Red-Hair Shanks, Luffy's idol, appears at the Paramount War and declares that unless everyone doesn't stop fighting, ''he'll'' take them on, ''everyone'' drops what they're doing and the most epic conflict of the series ends not on a bang, but a whimper.
** Caesar Clown tries to invoke this when Luffy's about to beat him, saying that attacking the scientist means bringing down the wrath of his ManBehindTheMan, Donquixote Doflamingo, and by extension, Kaido, another ''Yonkou'' Luffy, of course, could care less as he's been doing stuff like that since he first became a pirate; whatever he pleases and without care as to who he's ticking off.
* At the end of ''PrincessMononoke'', [[spoiler:Lady Eboshi decapitates the Shishigami,]] which [[strike:nearly]] causes [[spoiler:the destruction of the entire forest and nearby town.]]
* Done twice in ''Manga/FairyTail'', by the same person, in the same story arc, and pretty much at the same time. While attempting to simultaneously capture Zeref and annihilate Fairy Tail, Grimoire Heart, and specifically their leader Hades, manage to piss Zeref off to the point where he stops doing his best to avoid all life forms and proceeds to track Hades down with the intent to kill him. It's then revealed that Hades has also managed to draw the attention of Acnologia, a murder happy dragon capable of destorying continents.
* Kyon of ''LightNovel/HaruhiSuzumiya'' plans to invoke this if Nagato's alien boss tries to harm her. Haruhi, everyone's favorite obnoxious RealityWarper, doesn't even know there ''is'' a conflict. But in ''Disappearance'', Kyon determines a way to convince her aliens exist, and there's little doubt that she would effortlessly annihilate them if she knew they were after one of her clubmembers. This comes dangerously close to happening in a later novel.
* This is how ''LightNovel/{{Gate}}'' starts out; an empire in Roman battle gear with dragons and orcs decides to invade Earth starting at Ginza, Japan, thinking that it would be an easy invasion. Then the [[BadassArmy JSDF decides]] to [[CurbStompBattle get rid of them.]] To say [[ThereIsNoKillLikeOverkill it was one-sided]] is an understatement.
* After the tournament in ''Manga/MahouSenseiNegima'', Cosmo Entelechia attacks the Governor's Ball where Negi is currently negotiating with the apparently villainous Kurt Godel, a third party with power on par with Negi or Fate. Jack Rakan, Negi's current teacher who has so far refused to become involved, is also attacked. As a result, both parties become hostile to Cosmo Entelechia since they didn't like them anyway [[spoiler:though Jack Rakan is quickly eliminated and Kurt Godel already opposed them]]. What makes it even sillier is that there was no actual benefit to attacking like this: Cosmo Entelechia's goals did not require them to fight anyone at this point [[spoiler:since they already had all the keys they needed to enact the Rewrite ritual to "destroy" the Magic World. Negi's group didn't even know that Asuna was gone!]]

[[folder: Comic Books ]]
* In the 1960s ''{{Comicbook/X-Men}}'' comics, this happened to Magneto when he tried to recruit the Stranger via intimidation.
* In the original CrisisOnInfiniteEarths, {{Darkseid}} is somewhat of a example of this.

[[folder: Fanfiction ]]
* Moloch from ''FanFic/AeonNatumEngel'' fits the trope, and it didn't end well for anybody, Moloch included.
* In ''Fanfic/{{Renegade}}'', the Batarian Hegemony did this to the Global Defense Initiative by continuously supporting pirate and slaver raids into GDI territory in an effort to impede their colonization efforts. [[DisproportionateRetribution GDI expressed their disapproval quite violently.]] In addition, WordOfGod is that the Scrin [[spoiler: are apparently trying to avoid doing this to the Reapers.]]
* While the governement was favorable to help the League of Non-Aligned Worlds, the Earth Alliance in ''Fanfic/TheDilgarWar'' is initially neutral between the Dilgar and the League, save for a little tidbid: the Dilgar were to not invade the Markab and the Mentab. When the Warmaster Council vote to invade the Markab to reach the Vree ([[IgnoredExpert with Jha'dur saying that attacking the Markab was an immensely stupid act exactly because Earth protected them]]), the Dilgar curbstomps the Markab fleet only to meet Earthforce and a MacrossMissileMassacre of [[NukeEm nuclear weapons]] ([[ThereIsNoKillLikeOverkill about a dozen nuke for every ship the Dilgar had in that battle]]). The losses sustained in that single battle where more than anything the Dilgar had lost before in the entire war, and cost them the war.
* In ''Fanfic/WhatAboutWitchQueen'', [[HufflepuffHouse Tampere Empire]] is the largest country on the continent, but generally it focuses more on the Far East than Inner Sea (the region where Arendelle and Weselton are). However, the Royal Council of Arendelle fears that if [[spoiler:Drachner will manage to take over the entire Inner Sea region]], Tampere will end up steamrolling them to stop this.
* In the backstory of ''Fanfic/MassEffectHumanRevolution'', the Moon colonists tried to take over Earth by carrying out guerilla superfighter attacks and demanding the feuding supranational blocs of Earth cede control. All that did was make the Earthnoids mad.
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' novel-length story ''Fanfic/WithoutAHive'', this is what Queen Chrysalis does by (unsuccessfully!) attacking Canterlot, the capital of the strongest, most populous and most technologically-advanced nation on its planet, led by a family of PhysicalGods. Equestria now knows the Changelings are real, considers them extremely hostile, and begins a systematic attempt to uncover Changeling spies. [[NiceJobFixingItVillain Congratulations]], Chrysalis, on [[BrokenMasquerade breaking the Masquerade]].
* In ''FanFic/OrderInChaos'' the Minbari are neutral to the war between the Centauri and the Orieni, and immediately warn both sides of respecting their neutrality. The governments are only too happy to obey, given they know just how more powerful the Minbari are... Then a group of Centauri [[SpacePirates raiders]] decide to try and make a quick buck by preying on Minbari shipping and steal technology to reverse-engineer, and Orieni explorers seeking to find some alternate routes to Centauri space accidentally violate Minbari territory. The governments find out only when couriers warn them that a Minbari fleet intruded a battle and ''[[CurbStompBattle crushed both fleets at the same time]]'', and then have to convince two other Minbari fleets they had no idea of what had happened and they have no reason to flatten their homeworlds. The governments succeed. Those Centauri raiders... [[TotalPartyKill Not so much]].
* The main premise of the fanfic ''Game of Thrones: Vendetta.'' When Talisa's father hears about [[NastyParty the Red Wedding]] and of his daughter's death, he heads for Westeros with [[AlwaysABiggerFish his sellsword army]] hell-bent [[RoaringRampageOfRevenge on avenging]] his daughter, as well as Robb and Catelyn Stark. Admiral Yamamoto's quote also appears at the beginning of the story.
--> '''Bronn:''' (warning Tywin about Lucian Maegyr and his forces): The proof is right there. He destroyed House Frey and killed the Spicers. Not only is he going to wipe out Roose Bolton, but he will put your entire family to the sword...the Kingslayer, the Queen Regent, the boy King...everyone. He will do what Robb Stark failed to do: see whether or not you can shit gold.
* Fanfic/AThinVeneer kicks off when [[Film/StarTrekVITheUndiscoveredCountry the Federation and Klingon peace negotiations]] get interrupted by [[BabylonFive a group of refugees trying to escape the Earth/Minbari War.]] This wasn't sufficient to bring them into the war. The murder of twenty five million beings from several major nations in a Pearl Harbor-style attack on a Federation colony, on the other hand, brings the Federation, Klingons and Gorn into the Earth/Minbari War with a vengeance.

[[folder: Film ]]
* Franchise/{{Godzilla}}, frequently (and literally).
* The United States as per the final voice over of the trope quote in ''ToraToraTora''. Maybe Yamamoto [[BeamMeUpScotty never said it]] - but he should have.
* ''Film/{{Firefox}}''. Gant is infiltrating the Soviet Union as a common smuggler, in the hope that this will attract less attention from the KGB.
-->"If you tip-toe past the dragon, it might just raise an eyelid and sniff at you. But if you awaken it..."
* Several supplementary sources in the ''Franchise/StarWars'' franchise reveal that Tarkin's destruction of Alderaan may have been the true tipping point in the war, as crossing the MoralEventHorizon in such dramatic fashion led to thousands of worlds that formerly submitted to Imperial rule flipping to Alliance-aligned almost instantly.

[[folder: Literature ]]
* The Ents from ''Literature/{{The Lord of the Rings}}'' {{curb stomp|Battle}} Saruman's fortress of Isengard after he [[GreenAesop cuts down their forest to burn it for fuel]].
** In Peter Jackson's [[Film/TheLordOfTheRings film adaptation]], the ents decided ''not'' to intervene -- until Merry and Pippin steered them toward the site where all the trees had been burned down.
** Other examples from the trilogy are the Dwarves of Erebor (whom Sauron turns into enemies with his FauxAffablyEvil messenger) and the Rohirrim (whom Saruman almost had reduced to political paralysis until Gandalf revealed TheManBehindTheCurtain.)
* ''[[Literature/RowanOfRin Rowan And The Zebak]]'' does this with a dragon.
* In ''Literature/TheDarkIsRising'' series, in the novel ''Literature/{{Greenwitch}}'', the Greenwitch is part of the Wild Magic, which is neutral between the Light and the Dark. She is not powerful enough to present a direct threat to either faction on her own (although Tethys is), but she does end up in a situation where she has something both sides desperately need and can't take without her consent.
* During the early ''Literature/HonorHarrington'' novels, both the Manticorian and Havenite forces are very careful to avoid certain activities (such as planetary bombardment) that will attract the ire of the Solarian League, a star nation that comprises 80% of the human population in the galaxy. Later on, as conflict builds between Manticore and the Solarian League, it becomes obvious that the League, though huge, is no longer the military powerhouse it used to be: fifty years of [[LensmanArmsRace Manticorian/Havenite conflict]] has left the massive League navy [[CurbStompBattle hopelessly outclassed]]. It is also made clear that if that was the only problem the League was facing, it would ''still'' be the this trope -- the League is still technologically sophisticated, it's just that it has mostly gone to civilian tech (which doesn't help the military) or the Frontier Fleet (which is severely lacking in larger warships, and the way battle works in the Honorverse means larger ships have a major advantage over smaller ships), and the League is so massive that it has the space and industry to buy time to upgrade their ships of the wall and then roll over Manticore. The ''real'' reason why it isn't is that this particular giant is beginning to collapse.
* Literature/TheCulture, from the [[Creator/IainBanks Iain M. Banks]] novels. From ''Literature/UseOfWeapons'': "You might call them soft, because they're very reluctant to kill, and they might agree with you, but they're soft the way the ocean is soft, and, well; ask any sea captain how puny and harmless the ocean can be." Or, if that's a bit flowery for you, there's the universal adage of the civilizations which have dealings with them; "Do not fuck with The Culture." See ''Literature/ConsiderPhlebas'' and ''Look to Windward'' for what happens when those civilizations don't follow that advice. Someone phrased it as "The first rule of dealing with The Culture is that you do not fuck with The Culture. The ''second'' rule of dealing with The Culture is that you do '''not''' fuck with The Culture. The last rule is that ''you don't fuck with The [[OhMyGods godsdamned]] Culture!''"
* Another [[Creator/IainBanks Iain M. Banks]] example: in the non-Culture novel ''TheAlgebraist'', the Dwellers (in gas giants) have a reputation for wiping out civilizations that piss them off...but they don't care what the inhabitants of rocky Earthlike planets do to each other as long as they leave the Dwellers alone. One of the book's many subplots concerns trying to persuade the Dwellers to help defeat an invasion fleet ''before'' they get around to attacking the local gas giant.
** Banks is fond of this trope. The entire plot of ''Consider Phlebas'' is driven by the fact that the Culture and the Idirans have to tiptoe carefully around the Dra'Azon, a very powerful species who happen to have designed the planet they are fighting over as a sort of museum.
* TheProtagonist becomes the ultimate Even Bigger Neutral by the Third (and last) Part of ''Literature/{{Tranquilium}}''. He has some very long-term plans in operation, but mostly he just [[OrcusOnHisThrone sits there, confusing enemies and allies alike with his apparent inactivity]]. Then a [[PathOfInspiration cult]] kidnaps his son to either use him for or blackmail his father into working with their occult plans. The father arrives and dismantles the entire cult, dashing their last chance to carry out their scheme in the process and finishing with a ([[KnightInSourArmor jaded]]) BreakingSpeech.
* David Weber's ''Literature/OutOfTheDark'': when the alien invaders are about to make the human race extinct, someone on Earth [[spoiler:(Count Dracula)]] finally decides to come out of his self-imposed exile and show them what ''real'' monsters can do.
* By introducing late 20th century technology and ideas in early 17th century Europe the time traveling Americans of ''Literature/SixteenThirtyTwo'' have awoken the interest of the Ottoman Empire: the mightiest military power of its time, ruled by a Sultan named [[NamesToRunAwayFromReallyFast Murad the Mad]], who is, according TheSpymaster Francisco Nasi, [[OhCrap as intelligent as he is insane and bloodthirsty]].
* ''Literature/TheDresdenFiles'':
** Used in the books to explain why the various supernatural factions upkeep TheMasquerade: they fear what would happen if mortal humanity became aware of what else was out there. Bringing mortal authority around into a supernatural argument is compared to the [[GodzillaThreshold nuclear option]]. At least that's how it's explained in-universe ''to'' humans. Most factions have enough additional reasons it's hard to judge their real priority.
** Still, the big example of this having happened is the tale of how the Black Court of vampires used to be incredibly powerful with many members, until the White Court vampires arranged the publication of ''Literature/{{Dracula}}'', making all their weaknesses public knowledge. They're not nearly so numerous nowadays.
* In Tolkien's ''Literature/TheSilmarillion'', [[{{God}} Eru Ilúvatar]]. Specifically, in the Akallabęth, when the Númenórians invaded Valinor: "But Ilúvatar showed forth his power, and he changed the fashion of the world" - that is, Ilúvatar changed the world from '''flat''' to '''round''' and, incidentally, sank Númenor beneath the sea in the process.
* In ''HarryPotter'', the motto of Hogwarts school is "never tickle a sleeping dragon" and would appear to be the wizarding equivalent of this saying. [[spoiler: It turns out not to refer to Hogwarts ''itself'' as a superpower, but rather the fact that to attack Hogwarts is to put in danger nearly every wizarding child age 11 to 17. This has the rather {{egregious}} effect of pissing off every witch or wizard related to someone at the school, ''which is damn near all of them.'']] Taken a bit further when [[spoiler:Kreacher is able to turn the entire house-elf staff of Hogwarts to side with Harry rather than stay out of the fight. Not only do the elves have powerful magic, they are also small and carry very sharp knives, easy for attacking one's knees and shins]].
* In SMStirling's {{Emberverse}}, the Provisional Republic of Iowa is far away from most of the action and has no reason to get involved...[[spoiler: until the Cutters kill the Republic's ruler and try to kill his family, revealing how far their tentacles extend and infuriating the surviving leadership of the Republic]]. Since Iowa is a superpower in its own right, and can call on its local neighbors for additional troops and help, this makes the strike at Pearl Harbor look like genius.
* ''Literature/TheMarkOfTheHorseLord'': a Scottish chieftain has to prevent an enemy queen from drawing TheRomanEmpire into their tribal war.
* Star Trek: The Great Starship Race reinforces this as the Romulan view of the Federation. The Romulan commander even outright compares the Federation to a very gentle looking furry giant who was sleeping and the Romulans as hunters after the giant's pelt. They had expected the giant to cower in fear when they attacked with their skinning knives instead the creature roared defiantly ready to fight tooth and claw to the death.

[[folder: Live Action TV]]
* ''Series/BuffyTheVampireSlayer'': Quentin rallies the Watchers Council to fight the First Evil, seconds before a bomb goes off and kills off the entire Watchers Council.
* The Doctor of ''Series/DoctorWho'' is almost never looking for trouble and is willing to negotiate wherever possible, but his hand is so often forced that he's probably racked up more kills than anything else in the universe. Despite this, he remains a TechnicalPacifist at heart and only uses violence as a last resort. Unless you're the Daleks, in which case it's plans A-Z.
--> '''Family of Blood Member''': He never raised his voice. That was the worst thing. The fury of the Time Lord. And then we discovered why. Why this Doctor who had fought with gods and demons, why he had run away from us and hidden. [[FateWorseThanDeath He was being kind.]]
* In ''Series/GameOfThrones'', Khal Drogo really didn't care all that much about Westeros, until Robert tried to have Daenerys assassinated. Then he becomes hell-bent on vengeance.
* In the ''Series/StargateSG1'' pilot, Apophis thought he was just kidnapping a host from a human population, albeit one with rather noisy projectile weapons instead of swords and spears. [[ButForMeItWasTuesday Business as usual for the Goa'uld.]] As it turned out, he pissed off possibly the only civilization in the Milky Way with the exact combination of manpower, militarism, scientific knowledge, and [[CrazyEnoughToWork insanity]] needed to end not only his own tyranny, but that of his entire species.
** The Tau'ri are also guilty of this trope at least twice - first in ''Series/StargateAtlantis'' and the following year in Season 9 of ''SG-1'', in both cases awakening a powerful alien race that rules an entire galaxy (the Wraith, then the Ori), becomes hell-bent on getting to the Milky Way, [[spoiler:and at least in the Ori case, actually succeeding]].
* In the backstory episode of ''Series/BabylonFive'', "[[Recap/BabylonFiveFilm01InTheBeginning In The Beginning]]," Londo is pressured to provide info on the mysterious Minbari for Earthforce so they could do an armed probe of their territory. Londo agrees, but pointedly warns them that the Minbari are not to be underestimated, and comments that "I hope you do not wake the Dragon." Of course, the Human force is led by a trigger happy idiot who does precisely that, and suddenly Earth is in a crushing HopelessWar against an overwhelmingly superior foe on a genocidal crusade against Humanity.
* Sisko's efforts to get the Romulans into the Dominion War in ''Series/StarTrekDeepSpaceNine'' end up turning the tide of the conflict.
** This is also a view of Starfleet and the Federation in general by other organizations - the Prime Directive tells them to keep out of the affairs of other species, which includes other space faring races. However, when they are forced to be involved, they do everything they can to end the conflict. Sure, the Federation are the good guys, but when pushed...
*** A specific example comes from ''Series/StarTrekTheNextGeneration'' - the Federation is determined to stay neutral in the Klingon Civil War, as it is a purely Klingon affair. But when the indications are that the Romulan Empire is involved, that gets Starfleet's attention. When they manage to intercept a group of cloaked warbirds on approach to Klingon space, the Romulans know better than to make their delivery - doing so would make the Federation have to get involved, and the Romulans don't want a war with them.
*** The Romulans are actually something of an odd case, as they ''do'' want war with the Federation. However, they want to start it on their terms[[note]]especially by avoiding a two-front war with the Federation and the Klingon Empire[[/note]], hence all the subterfuge. They won't start a fight, but they will manipulate the Federation into giving them an excuse.
** Not just the Romulan involvement in the Dominion War. The entire Dominion War itself could be considered this from the Dominion's perspective, as they ''severely'' underestimated Federation technical prowess and industrial capacity, to the point that Federation engineers became an entire army of [[MemeticBadass Memetic Badasses]] in the eyes of the Dominion, who witnessed the Federation turn just about anything they could get their hands on into a starship and cranking their industrial base UpToEleven, to the point that one Vorta claimed a Federation engineer could "turn rocks into replicators". Not to mention the original Dominion contingent had no idea how [[HumansAreWarriors warlike]] humanity could become when the need arose. (Their Cardassian allies were considerably more GenreSavvy in this regard, however.)

[[folder: Tabletop Games]]
* In ''TabletopGame/{{Warhammer 40000}}'' for the 6th ed. [[HordeOfAlienLocusts Tyranid]] Codex, a weird case of this happens to the two most dangerous factions, Chaos and the Tyrannids, and in this case each are the other's "Awakening the Sleeping Giant". What happens is an Imperial world was guarding an otherwise indestructible, cursed object from the Dark Age of Technology. A splinter Tyrannid fleet finds this world and launches an attack. Even with the backing of the Grey Knights, the Imperials end up getting slaughtered completely which ends up causing the cursed object to open a hellgate. Daemons pour out and get an "Awakening the Sleeping Giant" moment. There are no surviving humans left to steal souls from and even the planetary ecology is being altered so there's nothing Imperial to desecrate. Largely neutral to the Tyranids before, the Daemons are royally pissed, so they turn their wrath on the Tyranids. The Tyranids end up getting butchered under the daemon onslaught and even their initial dropship reinforcements get mutated to death from all the warp energy coming out of the gate. Even the hardest units of the Tyranid get wiped out. Having their asses handed to them causes the Tyranids to get their "Awakening the Sleeping Giant" moment. Before having a concept of Chaos as a separate faction, they considered the odd warband they wiped out as simply "prey" like any other. Now for the first time, Tyranids register Chaos as "Predator" that's equal to themselves. The Hivemind presence blocks out most of the warp energy on the planet. This weakens the Daemons enough that the Tyranids can regroup and have their forces that are stationed on other continents throw themselves into the digestion pools. They then reform as an immense ring of artillery units surrounding the Chaos infestation to bombard them into a standstill while Zoanthropes and the Tyranid heavy-hitters are sent in to deal with the survivors. The counterattack massacres the Daemons and the Tyranids take the planet, causing the chaos artifact to implode. Unfortunately the Daemons aren't obliterated when they are killed, they'll simply come back to life with knowledge of how to fight the Tyranids, and one Greater Daemon of Tzeentch was able to escape intact through the Hellgate. Now the forces of Chaos sees the Tyranids as a real threat to their plans and are plotting their revenge...
** Also, the Damocles Crusade; the Tau Empire was expanding and annexed a few minor worlds. This pissed off the Imperium, who sent a major Task Force to take the planets back and destroy the Tau. The Tau were completely blindsided at how relentless the humans were, and only survived due to adapting their tactical doctrine and the timely arrival of the Tyranid Hive Fleets.

[[folder: Video Games ]]
* ''VideoGame/CommandAndConquer'':
** Narrowly averted in ''[[VideoGame/CommandAndConquerTiberianDawn Tiberian Dawn]]'':
-->'''Seth:''' Kane's been loathe to attack America, but I feel that it's time, and that you're the one to do it. This is the Pentagon. A full frontal attack with your strongest forces should render their military center of operation-- '''[[KilledMidSentence *BLAM*]]'''
** Looking at Nod's arsenal, and some information of the Official Strategy guide, it's clear that Kane doesn't attack the US simply because he gets a lot of his weapons from US arms dealers. (Nod's units include the M2 Bradley, the Chenowth Desert Patrol Vehicle, the M-110 artillery, and even the Apache helicopter)
** Killian Qatar in ''[[VideoGame/CommandAndConquerTiberiumWars Tiberium Wars]]'' disapproved of Nod's attack on GDI Blue Zones precisely for this reason. She even paraphrases the trope line. And she was correct.
*** Might be a subversion, however, as Kane knew it as well but was counting on a massive GDI counterattack to fulfill his master plan.
* In VideoGame/FinalFantasyVI, the Evil Empire wakes up the sleeping magic creatures. They aren't happy about this.
** Along that same line, in [[VideoGame/FinalFantasyVII VII]] humanity finally pisses of Mother Nature enough that she awakens the Weapons, literal sleeping giants. There is no [[GaiasVengeance vengeance like a Gaia scorned]].
* Yukari Yakumo of ''VideoGame/{{Touhou}}'' is a powerful RealityWarper who's normally too lazy to get involved in anything. However, in ''Scarlet Weather Rhapsody'', [[LightIsNotGood Tenshi Hinanai]] destroys and then subverts the Hakurei shrine, putting Yukari's precious Gensokyo Barrier in jeopardy. When Yukari finally catches her, we see for the first time just what Yukari looks like when she's truly angry.
** Gensokyo has too many Sleeping Giants for its own good. It's strongly implied that shall Reimu ''ever'' fail in protecting the border ([[BoringInvincibleHero which is saying a lot]]), the dragon of Gensokyo will swoop down to deal with whatever problem there is. And it's not your standard fire-breathing Western fantasy dragon either: this dragon, when he/she/it appeared once in the past, fill the entire sky with his/her/its body. His/her/its presence alone cause extreme rain, enough to flood the entire Gensokyo. The dragon might be ''Gensokyo itself''.
** Giants that have awakened are: [[NinjaMaid Sakuya]] in ''Perfect Cherry Blossom''; [[RealityWarper Yukari]], [[OurVampiresAreDifferent Remilia]] and [[CuteGhostGirl Yuyuko]] in ''Imperishable Night''; [[CreepyDoll Medicine]] and [[AxCrazy Yuuka]] in ''Phantasmagoria of Flower View''. Those people normally don't overstep their domain, but you can't be so sure when SpringIsLate[=/=]BadMoonRising[=/=]DeathTakesAHoliday...
* Begnion in ''[[VideoGame/FireEmblemTellius Fire Emblem: Path of Radiance]]''. There is a war between two similarly sized nations, immediately south and bordering both of them is one three times as big as the two put together.
** The Dragons count for the sequel Radiant Dawn as well.
* Sonic The Hedgehog: ''SonicUnleashed'' - Despite being a horrifying EldritchAbomination depicted nearly destroying the earth each millenia since time began, Dark Gaia is not so much evil as simply a force of nature (shown by the fact that whenever it tried to destroy the world upon awakening, it would be rebuilt by its other half, Light Gaia, and start the process all over again). It wasn't until Eggman tried to control the monster's power by firing his beam from space and woke Dark Gaia prematurely that he really put himself and the entire fate of the world in deep shit. Only Sonic and a formerly amnesiac Light Gaia make everything right again.
* Both ''GalacticCivilizations'' and ''Franchise/MassEffect'' have a strange version of this. In both series, the humans are the galactic newcomers with little military to speak of, but our tenacity, bravery and the speed of build-up from token military into a powerhouse REALLY scares the other races. In ''Gal Civ'', the Drengin (an evil warrior race) are scared of the humans and in ''ME'' the turians (the resident galactic police race) generally don't harbor a grudge over the [[WeComeInPeaceShootToKill First Contact War]], but rather because they're the big, bad military and while the humans are a much smaller force, we're just as good, and did it in a tenth the time.
** In ''Gal Civ'', the Drengin are terrified because humans operate in an entirely different method than they expect as far as militaries are concerned. They have a large, standing military fleet. Humans had no fleet at all beyond trade and exploration vessels, until another species attacked them... at which point the humans rapidly built a fleet large enough to give the Drengin nightmares, completely slaughtered the offending race (As in total genocide; that race ''no longer exists'')... and promptly decommissioned and took apart all of its military fleet, returning to having no military at all. The Drengin are both terrified of the results the humans achieved and the fact that they would voluntarily go back to a completely demilitarized state afterward. They cannot wrap their minds around it.
*** [[FridgeLogic And yet, in the sequel, the Drengin are on the verge of beating the humans back to the Stone Age.]]
** ''VideoGame/MassEffect3'' has another example. Not that they were exactly sleeping by this point, but Kai Leng [[spoiler:stealing the data on the Catalyst out from under Shepard's nose]] finally pisses the Alliance off enough to focus their entire military might on Cerberus.
*** Also, the Alliance almost invariably forms the bulk of Shepard's War Assets, with only the [[HiveMind geth]] and [[ProudWarriorRaceGuy krogan]] coming close to matching them (though adding the {{DLC}}s puts the miscellaneous alien groups over the top). Nothing like a Reaper invasion to get an entire species motivated.
* Sort of in OverlordII. The elves [[spoiler:futilely try to stop the Overlord from clubbing baby seals.]] Due to these actions, the Overlord and his horde of Minions decide to kill some elves and [[spoiler: knock down their Sanctuary.]] He then decides to enslave or destroy both the elves and The Empire.
* The Trade Order in ''SinsOfASolarEmpire'' had no standing military to speak of. Just local planet-operated defense flotillas mainly consisting of frigates and cruisers in order to protect shipping lanes against SpacePirates. Then the [[TheEmpire Vasari]] invade with a massive fleet and thousands of years of technological advantage over the humans. They rapidly take a number of human colonies. Then the Trade Order gets reformed into the Trade Emergency Coalition, using its industrial and financial might to build an unprecedented number of warships, mostly using militarized versions of civilian ships. While the Vasari are still stronger in terms of technology and firepower, they can't possibly match the industrial capacity of the TEC. Even when the [[ScaryDogmaticAliens Advent]] join the conflict, the TEC are fully capable of waging a two-front war. Basically, WeHaveReserves is in full effect for the TEC.
** And yet again after the TEC undergoes a civil war in the ''Rebellion'' ExpansionPack, the two halves are capable of fighting off each other ''and'' the xenos; the Loyalists through [[GuileHero diplomatic maneuvering]] and [[HoldTheLine superior defenses]], while the Rebels [[TeachHimAnger crush everyone through expansionist warfare]] and [[EnemyMine alliances with SpacePirates and mercenaries]].
* ''WorldOfWarcraft'': WordOfGod gave this as their reasoning for having the Horde destroy Theramore, as a way to bring the Alliance into the war against the Horde proper. Of course, the Alliance fans felt the sleeping giant should have already been awakened by the attacks on Southshore, Ashenvale and Gilneas...
** In doing so, Horde Warchief Garrosh Hellscream has not only declared war on the Alliance, but also [[spoiler:the avowedly neutral Kirin Tor and the blue dragonflight]].
*** And on top of that, odds are fairly good that both the Alliance and the Horde will piss off [[spoiler: the pandaren, most notably the Shado-Pan, whose leader is outspokenly against the faction hostilities brought to Pandaria's soil, dismissing it as a race war and calling the factions out for trying to pull the pandaren into it]]. Considering that [[spoiler: Pandaria has a built-in defense mechanism called [[EldritchAbomination the Sha]] that react to and spawn from a variety of negative emotions, all of which both Red and Blue bring with them, and whose modus operandi is rampaging through the countryside until stopped]], odds are increasingly in favor of Red and Blue getting a handy asskicking before this is all over.
*** That is they'll be ''giving'' one considering that A:The sha have more or less been beaten down already and B:Both sides are already studying them for further conflicts (And in the case of the horde, weaponizing).
* ''{{VideoGame/Marathon}} 2'': A large part of the game revolves around Durandal's comparatively paltry forces (made up of humans and S'pht) trying desperately to defeat a Pfhor fleet. Then the player succeeds in getting a message out to the long-lost S'pht'kr, a very powerful and advanced race of S'pht, about their brothers' plight, which leads to the curb-stomping of the Pfhor in the system ([[spoiler:and plants the seeds for a decades-long conflict that eventually leads to the downfall of the entire Pfhor Empire at the hands of the S'pht'kr and humanity]]).
* ''ExitFate'' plays with this to the point that you don't actually realise it's been in effect until the very end. Rather large spoilers ahoy. [[spoiler:At the end of the first half of the game, [[TheHero Daniel Vinyard]] and his Elysium Army manage to defeat the [[TheAlliance State Union]]. Then, out of the blue, the [[TheEmpire Almenga Empire]] gets up and conquers the hell out of Daniel's homeland: the Kingdom of Kirgard for seemingly no reason. Since no one's quite sure what the Empire is up to, they're not sure why the giant awoke - so everyone from Elysium and the Union bands together and unites under Daniel to take them down... which is ''exactly'' what the BigBad, Emperor Siegfried, wanted all along. You see, Sieg's a WellIntentionedExtremist who wanted to put an end to war forever by creating the world's greatest leader using the Hand of Fate - a powerful demonic spirit capable of influencing destiny. Said spirit resides within the body of his son, who turns out to be none other than Daniel himself and, together, the Hand of Fate and Siegfried have been manipulating events to force the world to unite under Daniel's banner. The empire ''wasn't'' the sleeping giant - Daniel's own potential as a leader was. In Siegfried's own words, everything that has happened up until this point was to take away the leaders of the world so that they would be forced to unite under a new one - his son. The Elysium giant then goes on to completely dominate the crap out of Almenga and ends up assimilating it into the Elysium Republic in the ending... ''just as Siegfried planned''.]]
* '''[[VideoGame/TransformersFallOfCybertron Metroplex heeds the call of the last Prime.]]''' Literal and figurative. Before the energon shortage, there was plenty running through Iacon to have him take direct action well before, but he remained uninvolved, seeing no need. Right until the Ark was attacked.
* In ''VideoGame/BatmanArkhamCity'', the Penguin was not [[OneManArmy Batman]]'s target until [[TooDumbToLive Cobblepot decides]] to shoot a cop in front of him.
--> '''Batman:''' [[TranquilFury I came]] for Freeze and the hostages. [[PreAsskickingOneLiner Now I'm coming for you]].
* In VideoGame/ValkyriaChronicles, TheEmpire was hoping to use the neutral principality of Gallia as a staging ground and supply depot for their war against TheFederation. Three guesses as to who sends them packing in the end.
* ''StarWarsTheOldRepublic'': [[VideoGame/KnightsOfTheOldRepublic Revan and Exile]] mutally grabbed the IdiotBall and marched into the most obvious trap ''ever'' getting predictably stomped by [[VillainSue The]] [[OmnicidalManiac Sith]] [[HumanoidAbomination Emperor]]. Thanks to the two former protagonists and their firm grip on the idiot ball, ''no'' attempt was made to warn the Republic that the Sith Empire even ''existed.'' The Sith Empire merrily sat back and stockpiled ''everything'' it could muster for three centuries to strike back at the Republic, ostensibly for their GenocideBackfire a ''thousand'' years earlier. The Republic was caught with their pants down as the Empire waged a very successful shock and awe campaign, ending with the Treaty of Coruscant (which both sides knew was nearly worthless, and played right into the Emperor's bigger plan to [[OmnicidalManiac destroy everything in the galaxy except himself]]). Predictably, as soon as the truce was declared, the Sith [[ChronicBackstabbingDisorder started infighting]] while the Republic stockpiled and threw everything they could muster at the Empire. The Empire, starting with fewer troops, fewer Force Users, an untenable reliance on slave labor, and the infrastructure of a Third World backwater finds itself in ''serious'' trouble by the Makeb story arc, with Darth Marr admitting they're pretty much screwed [[spoiler: if their Hail Mary plan with Isotope 5 droids doesn't pan out]].

[[folder:Western Animation]]
* PlayedStraight and {{Discussed}} in the ''WesternAnimation/ThunderCats2011'' episode "Between Brothers" when the usualy pacifist Elephants, previously [[ObstructiveCodeOfConduct constrained]] by a need to meditate on their every dilemma, decide to enter the fight against the [[LizardFolk Lizards]]:
-->'''[[{{Keet}} Wilykit]]''': You just woke a village of [[ShoutOut sleeping giants]]!
-->'''[[ReptilesAreAbhorrent Ssslithe]]''': The elephants... [[ThisCannotBe the elephants never fight]]!
-->'''[[GentleGiant Anet]]''': Only rarely. But when we do, [[BewareTheNiceOnes we fight to win]]!
* In ''Franchise/{{Bionicle}} 3'', the characters are primarily searching for the mythical beast Keetongu because he can reverse their mutations, but since their leader defected to the bad guys and they are under constant attack by the [[GiantSpiders Visorak]] [[SpiderSwarm horde]], they also ask for his help in combat. At first he refuses, but with a heartfelt speech, they convince him to join the party. The fact that the Visorak were responsible for his status as the LastOfHisKind probably helped. [[spoiler:Although he doesn't partake in the grand battle, he does kill the horde's leader with a single blow.]]
* Pissing off the [[WesternAnimation/AvatarTheLastAirbender Avatar]] is probably the worst mistake you can do. Ask [[DisneyVillainDeath Chin]], [[BroughtDownToNormal Yakone]] and [[FateWorseThanDeath Zhao]] how it went.

[[folder: Real Life ]]
* Adolf Hitler attacked the Soviet Union in 1941, just because he wanted to. At the time he was the master of Europe from Poland to the Pyrenees and from Norway to Italy. Things turned out badly for him.
** Then he compounded it with the ultimate diplomatic blunder of the War: declaring war on the United States when he was under no obligation with Germany's alliance with Japan. All Hitler gained from that was to enable his navy to attack American ships who were interfering with his U-Boats' campaign to strangle British trans-Atlantic shipping, while US President UsefulNotes/FranklinDRoosevelt was able to join the fight with complete domestic political support.
* The actual TropeNamer, featured in the movie ''Tora! Tora! Tora!'', appears to be a case of BeamMeUpScotty, as there is no reliable record of Yamamoto ever saying it. He did, however, express similar sentiments, saying that Japan shouldn't declare war against the United States unless they thought they could dictate peace terms in the White House (which they obviously never could), and telling his superiors that he could "run wild for six months" but couldn't guarantee anything after that (Midway came six months almost exactly to the day after Pearl Harbor). Yamamoto only turned towards the Pearl Harbor attack after it became clear that the government was hell-bent on war with the United States.
** [[http://www.combinedfleet.com/economic.htm This page]] details how ''immense'' was the American potential. Basically, American industrial potential was such that it took ''every single other major player combined'' to match what the Americans produced in the war (and that with most of the players having a headstart of over two years), and what's worse by 1945 they were just ''warming up''. The best example of this is that in two different years, American war plane production was greater (86,000 in 1943 and 96,000 in 1944) than Japan's ''entire wartime total'' (76,000, from 1939-1945). Then add in that most of the American planes were of newer design, better armed, better armor, and you get a ridiculously massive discrepancy.
* Imperial Germany during World War I did pretty much the same thing as Hitler and Japan. In 1917. they offered Mexico an alliance with the promise of helping them reclaim Texas, New Mexico, and Arizona. Germany hoped that if the Mexicans invaded, then America would be too busy to join the Entente or send them supplies. The British intercepted the transmission and passed it along to the Americans, who promptly declared war on Germany, and began churning out ''massive'' amounts of weapons and supplies for their new European allies. And within a year (they needed to raise and train the troops first), ''millions'' of fresh American reinforcements arrived in France and by the end of 1918, Germany had surrendered.
* Pyrrhus (he of the PyrrhicVictory) did this to Rome. Before facing him, Rome was a regional power in the largely barbaric Italy, mostly concerned to keep the Gauls and other hostiles away, trade with their neighbours and the then-ally Carthage and defend their Italian allies. Then Tarentum got in a squabble with one of Rome's allies and, [[OhCrap realizing they were completely outmatched]], cashed in a favour that Pyrrhus owed them, and by the end of the war, in which they had defeated a major Hellenistic power whose army was led by ''the'' greatest general of their time, the Romans realized they could conquer the Mediterranean, and were now inclined to try.