[[caption-width-right:250:Dionysius had [[TheChainsOfCommanding a point to make]].]]

->''"Fear will keep the local systems in line. Fear of this battle station."''
-->-- '''Governor Tarkin''', stating his [[http://starwars.wikia.com/wiki/Tarkin_Doctrine named doctrine]] in ''StarWarsANewHope''

A weapon used as a deterrent, to sway ''people'' into acting in a certain manner. This comes from the second moral of the original story of the Sword of Damocles, where "The value of the sword is not that it falls, but rather, that it hangs."

More often than not, the weapon is intended to have some type of height advantage, to more explicitly invoke this image. This can include launchable weapons that once off the ground serve that purpose.

The KillSat may easily be an example of this. The WeaponForIntimidation is a somewhat related, smaller scale version. See also AppealToForce and GunboatDiplomacy.



* Nationwide Insurance has a commercial where a woman's insurance deductible hangs over her head as a giant rock in a net, threatening her much like the titular Sword. ("The World's Greatest Spokesperson in the World" is able to make it shrink with Nationwide's "vanishing deductible".)

[[folder:Anime & Manga]]
* In ''CodeGeass'', Schneizel's ultimate plan is to scare the world into peace by hanging a KillSat fortress armed with [[NuclearWeaponsTaboo the Geassverse's equivalent of nukes]] over their heads. Appropriately enough, the fortress is actually named Damocles.
* The power of Kira in ''Manga/DeathNote'', to instantly kill evil or unethical people (or anyone you want really), has limiting the world to good, obedient people as its intended consequence.
* This was Pain's plan for the tailed-beasts powered weapon in ''{{Naruto}}''; [[FantasticNuke to create (and even use) a weapon so terrible that it would put an end to war]], at least until people stopped fearing it and it would have to be used again.
* In ''Manga/OnePiece'', the protection or threat of one of the Three Great Powers is used to control specific locations. Whitebeard's protection kept people from attacking even the weakest of his territories, Boa Hancock's membership in the Seven Warlords of the Sea protected her home of Amazon Lily, and the threat of a Marine Admiral, Buster Call, etc., kept certain laws and policies in place for the marines.
** The Three Great Powers are more of a delicately balanced UsefulNotes/ColdWar. The deterrent is their respective strengths. The Buster Call would fit with this trope more, though there is no one weapon in the series yet that keeps any sort of peace. On a smaller scale, things ''are'' protected using the threat of powerful individuals.
** The World Government and at least one other independent villain have tried and so far failed to acquire a truer version of this trope in the form of one of the three [[LostSuperweapon Ancient Weapons]]. The World Government are convinced that with an ancient weapon at their disposal, they'll be able to end the age of piracy (and [[LaResistance any other opposition]] to [[TheEmpire their rule]]). Said independent villain was also confident that the World Government would let him get away with anything once he had attained the weapon Pluton.
* In ''Anime/CastleInTheSky'', Muska takes control of Laputa for just this reason.
* In ''Manga/SoulEater'', Arachnophobia get their hands on an ArtifactOfDoom named Brew, but it doesn't work ([[spoiler:because Medusa's team stole the real one and gave them a fake]]). However, Arachne still realizes it to be useful because everyone ''thinks'' they have it, and thus can still threaten enemies into retreating.
* ''Manga/FistOfTheNorthStar'' had Raoh effectively act as this: Indeed, during his first battle with [[TheHero Kenshiro]], news of him ''not winning'' (the fight was a draw, but this was as good as outright losing to the lands Raoh conquered, and to his minions) and him hiding away to recuperate had his territories descend into chaos. It's only when he returns does he restore order to those regions.
* Literal Swords hang over the Kings' heads in ''{{Anime/K}}'', referred to InUniverse as "Swords of Damocles". They are manifestations of a King's power, and if Kings overextend their power and the Sword falls, large areas around them will be destroyed as well. When it gets close to this, the only way to prevent it is for the King to be slain - but it is difficult for one who is not a King to slay a King, and the burden of killing a King puts a huge strain on a King's sword... leading to something of a cycle [[spoiler: that two generations of Red and Blue kings have found themselves in]]. Both seasons of the anime have the possibility of this situation as a plot point.
* In ''Anime/DragonBallZResurrectionF'', this is why Freeza's minions have him revived - the empire has fallen apart in his absence, and they see him as the only way they'll be top dog again. It's a bit of an own goal, since he's [[BadBoss back to killing people who disagree with him]] almost immediately.

[[folder:Comic Books]]
* In ''ComicBook/{{Watchmen}}'', Nite-Owl's Archimedes seemed to be intended to serve this purpose, and was used this way when there were riots in the streets. Though, as it was his ship, it wasn't exactly taken seriously.
** This is also [[spoiler:Ozymandias's plan -- by creating fear of an extraterrestial attack, he intends to scare the planet into world peace. It seems to work, but close examination reveals he launched his plan just as the United States and the Soviet Union were about to start peace accords anyway, meaning that he's scuttled real peace in favor of peace based on a false fear, liable to collapse if it's ever revealed... like what may be happening a few days after the last panel.]]

[[folder:Films -- Live-Action]]
* ''Film/InLikeFlint''. Gen. Carter schemes to load a space station with nuclear bombs instead of a weather laboratory (under the code name Project Damocles) and launch it into orbit around Earth.
* One of the songs in ''Film/TheRockyHorrorPictureShow'' is titled "The Sword Of Damocles". In said song, Rocky sings about how he's just been born and how he can already fear that something is about to go terribly wrong.
-->'''Rocky''': (Singing) The Sword Of Damocles is hanging over my head. And, I've got the feeling someone's gonna be cuttin' the thread.
* In ''Franchise/StarWars'', this is what Tarkin intended the Death Star and its [[EarthShatteringKaboom superlaser]] to be used for: The threat of having your planet instantly destroyed would (presumably) curtail the ambitions of any seditious systems and work more efficiently than actually physically oppressing someone by force. The ExpandedUniverse gave this philosophy the name "The Tarkin Doctrine", and revealed that TheEmpire built an impractically large number of various planet-destroying devices in an attempt to implement it in practice. Since they all had a nasty tendency to get hijacked or blow up due to Rebel Scum, sabotage, or other unfortunate circumstances, the doctrine was a resounding failure.
** It wasn't just the implementation that was flawed: The Tarkin Doctrine [[MoralEventHorizon demolished whatever legitimacy the Empire might have had]], pushing systems and individuals who might otherwise have sat on the fence [[NeutralNoLonger into supporting the Rebels openly]]. The fact that the Death Star's first target was [[NeverHurtAnInnocent a civilian planet]] (and that it was destroyed [[KickTheDog even though Leia seemed to be cooperating]]) didn't help at all.
* In ''Film/AustinPowersInGoldmember'', this is the intended effect of Preparation H.
* The evil professor from ''Film/RealGenius'' makes his genius students build him a laser (while his ButtMonkey student/valet works on the tracking system) for a space-laser version of one of these he promised to the military (for a supposedly obscene amount of money).
* Tony Stark's exposition of his Jericho Missile in [[Film/IronMan Iron Man]] might be a variation of this; a weapon that only needs to be fired ''once''.
-->'''Tony Stark''': They say that the best weapon is the one that you never have to fire. I respectfully disagree! I prefer the weapon you only have to fire '''once'''. That's how Dad did it, that's how America does it... and it's worked out pretty well so far. Find an excuse to let one of these off the chain, and I personally guarantee you the bad guys won't even want to come out of their caves.
* In TheReveal at the end of ''Film/TheDayTheEarthStoodStill1951'', Klaatu claims that this is why his people built Gort and other robots like him; the robots were purposely programmed to destroy Klaatu's planet if war ever started, preventing the species from ever doing so.

* Creator/RobertAHeinlein
** ''Literature/BetweenPlanets''. The Circum-Terra space station has hundreds of nuclear missiles, enough to destroy any military force that threatened Federation control of Earth.
** ''Literature/SpaceCadet''. One of the Patrol's routine tasks is to maintain the string of satellite nuclear weapons orbiting Earth. Unlike ''Between Planets'' which involves TheWarOfEarthlyAggression, this is presented as UtopiaJustifiesTheMeans. The protagonist however has to address the issue of whether he might be called upon to nuke his own hometown some day.
* ''Literature/TheDresdenFiles'':
** Referred to overall as the "Doom of Damocles." The "Doom" is applied to those the White Council believes to be ''just'' shy of irredeemable, and can summed up as "One strike and you're out." With "out" meaning, "beheaded by the Wardens." Note that this usage has little to do with this trope and is based on the original meaning of the term (see the Other folder for explanation).
** ''Literature/GhostStory'' reveals that Harry himself served as this for Chicago with a lot of the supernatural community. They found him so terrifying that most just ''didn't bother showing up.''
* Referenced in ''Literature/TheSalvationWar'', when referring to Uriel. Considering what Uriel is capable of, even with tinfoil hats and cruise missiles to stop him, this is not surprising.
* Voldemort in the ''Literature/HarryPotter'' series uses the werewolf Fenrir Greyback this way: do what he says or he'll send Greyback after your kids. As Lupin (who was himself bitten by Greyback as a child) puts it, "It's a threat that usually yields good results."
* ''[[Literature/HonorHarrington Mission of Honor]]'': When Honor shows up at [[spoiler:Haven to negotiate a peace treaty]], her fleet of superdreadnoughts in orbit are referred to as "an infinitely polite sword of Damocles".

[[folder:Live-Action TV]]
* ''Series/StarTrekTheOriginalSeries'' episode "Assignment Earth". The U.S. is about to launch an orbital nuclear warhead platform. Gary Seven's mission is to make it malfunction to scare other nations into not using them.
* This was taken very literally in ''Series/PowerRangersZeo'', where [[BigBad King Mondo]] dug up a "powerful but unstable" weapon called the Damocles Sword which he had buried centuries ago so he wouldn't be tempted to use it. Apparently, the sword was a self-induced version of this Trope, which he broke after thinking he could defy it. As it turned out, his choice was a foolish one. Trying to fight the Rangers with it only resulted in him losing the battle (and being the first BigBad of the franchise to fall in combat to the Rangers, a very dubious honor).

[[folder:Myths & Religon]]
* The OlderThanFeudalism [[http://en.wikipedia.org/wiki/Damocles trope namer,]] of course. As you know, he was a [[YesMan courtier]] at the court of the tyrant Dionysius II of Syracuse (Sicily, Italy). When he praised the tyrant for being so fortunate, Dionysius decided to give him a lesson and offered him his throne. Damocles accepted, but the tyrant hung a big sword above the throne, held only by a single hair (of a horse's tail). Soon, Damocles didn't think anymore that Dionysius was so fortunate...
** Of course, [[ValuesDissonance the moral has been somewhat skewed over time]]. Nowadays, the moral is that people can't live a happy life if they're in fear. Originally, the idea was a harsh lesson in TheChainsOfCommanding, and the titular sword shows that his reign could fall at a moment's notice, especially in the time it took place. It's also argued that the original moral of the story was simply, "be content with what you have", showing the above as stress of how being in power isn't all it's cracked up to be.

[[folder:Tabletop Games]]
* ''TabletopGame/DungeonsAndDragons'':
** The TabletopGame/ForgottenRealms spell ''Blade of Doom'' causes a sword-like blade of force to come into existence over the target creature. When the target performs a specific act, the blade drops onto the target, damaging it.
** The ''Book of Vile Darkness'' has a few spells that answer the question of "why don't the commoners rebel against the evil empire?" pretty succinctly, including one that causes it to rain acid over an entire region for months.

[[folder:Video Games]]
* In ''VideoGame/FinalFantasyXII'', though not an actual weapon [[spoiler:(unless you count living people as potential weapons), Basch Fon Ronsenburg is the Sword of Damocles Vayne put in place to Marquis Halim Ondore IV, having proclaimed him executed years ago when Vayne told him to]]. He even mentions the trope in dialogue upon discovering it.
* In ''VideoGame/SonicAdventure2'', the Eclipse Cannon was intended to serve as this. This is why it was only fired as an example. No point in Dr. Eggman ruling an empty planet, is there?
* ''VideoGame/MetalGearSolidPeaceWalker'' pretty much runs on this trope; set during the UsefulNotes/ColdWar, the game's villain creates a series of bi-pedal nuclear tanks that, following an initial nuclear attack to prove its capabilities, grants the closest thing to peace through [[http://en.wikipedia.org/wiki/Mutual_assured_destruction mutually assured destruction.]]
* In ''VideoGame/FrontMission'' Evolved [[spoiler: the main enemy is revealed to be a terrorist group known as The Sword of Damocles and they plan to use a orbital laser to keep the nations of the world under their thumb]]
* At the end of the Ancient China chapter in ''VideoGame/LiveALive'', Odi Wang Lee reveals he always has a pair of assassins living behind his throne, with orders to attack whenever they see fit. They're strong enough to kill him, and thus he must always remain on guard - this is how he stays strong enough to be a powerful martial artist. They also serve as a last line of defense when the Xin Shan Quan master wipes out Lee's inner circle.
* ''[[VideoGame/SoulSeries Soul Calibur IV]]'' features "Critical Finishes", OneHitKill {{Finishing Move}}s that can only be used when your opponent's Soul meter is empty and yours is full. Since the Soul meter empties through blocking, they are clearly meant to discourage excessive blocking and are not meant to be seriously used.
* ''VideoGame/RyseSonOfRome'' has this in the form of a dagger, one that's standardly issued to every Roman officer. It has the picture of the titular Damocles on it, though in contrast to the actual legend Damocles was a Roman officer who was betrayed by his commanders in the middle of a battle. He came back to life after being killed, donned black armor and a white face mask stained with blood, and killed them. Roman officers keep the daggers on them as a reminder to treat their legionaries well and to be brave in battle, should the Black Centurion come to kill them as well.
* ''Franchise/TheElderScrolls'': In the distant past, MadGod Sheogorath hurled a rogue moon at the newly built {{Egopolis}} of the Dunmeri [[PhysicalGod Tribunal Deity]] Vivec. Vivec saved the city by freezing the moon high above it, but then invoked this trope. He told his followers that the moon was held in place by their love for him, and that if they should stop loving him, it would fall. [[spoiler: Due in no small part to the player's actions in ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'', Vivec disappears early in the 4th era. Some temporary measures are enacted to keep the moon in place, including the use of a [[PoweredByAForsakenChild a soul-burning machine]]. However, those attempts prove futile, and the moon falls with it's original momentum, causing [[ColonyDrop province-wrecking]] results. Years later, the waters where the city once stood are still boiling]].
* In ''VideoGame/PlanetAlcatraz'', the PenalColony planet has a [[KillSat space station]] hovering in orbit, equipped with weapons capable of wiping out anything more technologically advanced then allowed. Wanna build guns to kill each other? Go ahead. Hey, what's that down there? It looks like a spaceship. Better scorch it, to be sure.
* ''Franchise/{{Halo}}'': In ''VideoGame/Halo5Guardians'', it turns out this is the exact purpose of the titular [[AntagonistTitle Guardians]], massive Forerunner war machines. A single Guardian has enough firepower to keep an entire solar system under control. At the end of the game, we see one of their weapons is an EMP burst strong enough to overwhelm an entire planet.
* In ''Videogame/{{Tyranny}}'', Kyros' Empire is maintained in part by the threat posed by their Edicts. The Edict of Execution in Act I is perhaps the best example. Its entire purpose is to force the Disfavored and the Scarlet Chorus to get their act together or die, with an eight day time limit [[spoiler:or a 363 day time limit, since Kyros' Edict only mentioned that they needed to be done on the Day of Swords, but not necessarily ''that year's'' Day of Swords.]] It's a sign of just how bad things are between the Disfavored and the Scarlet Chorus (the armies and their respective Archons just hate each other that much) that even the looming threat of being wiped out in a matter of days isn't enough to stop them from infighting. You have a vested interest in figuring out a solution since you're stuck in the valley too, meaning the Edict will kill you as well.
* The infamous Spiny Shell (also known as the Blue Shell) in the VideoGame/MarioKart series serves this purpose, or rather, the threat of one. It is a weapon that seeks out the racer in 1st place and slams into them, causing an explosion that stops them cold for several seconds and, with a few exceptions, [[UnblockableAttack cannot be avoided]]. Everyone who has played Mario Kart games for long enough will feel on edge whenever they're ahead in case someone obtains a Spiny Shell. And in the games where other players' items are visible, such as ''Mario Kart DS'' and ''Mario Kart 8'', you can sometimes see people in the lead slam on the brakes and let people overtake them when they see someone get one. And this mechanic works very well--so well that most other kart racers [[FollowTheLeader have adopted similar weapons]]: the Ghost in ''VideoGame/SnowboardKids'', the Swarm in ''[[VideoGame/SegaSuperstars Sonic & All-Stars Racing Transformed]]'', the Blue Pac-Bomb in ''VideoGame/PacManWorldRally'', etc.

[[folder:Web Comics]]
* Xykon discusses this in ''Webcomic/TheOrderOfTheStick'' prequel ''Recap/StartOfDarkness''; he would only have to unleash [[EldritchAbomination the Snarl]] once or twice as part of his bid for world domination, and fear of the Snarl would keep anyone from opposing him ever again.
* [[EmperorScientist Klaus Wulfenbach]] of ''Webcomic/GirlGenius'' is a self-described enlightened despot with only one rule: Don't Make Me Come Over There. As long as the realms of Europa don't wage war on each other, police bandits and renegade [[MadScientist Sparks]] to an acceptable degree, and turn over [[ArtifactOfDoom devices of The Other]], they may rule as they see fit. When they don't, well, that's when the armies, [[EliteMooks Jaegermonstern]], [[HumongousMecha battle clanks]], and [[CoolAirship air fleet]] earn their pay. Even Wulfenbach doesn't have enough of an army to fight everyone, but he can and will enact DisproportionateRetribution on [[WhoWillBellTheCat whoever steps out of line first]].

[[folder:Western Animation]]
* ''WesternAnimation/JusticeLeague'':
** In "Maid of Honor", Vandal Savage attempted to use a space-based rail gun to aid his world domination.
** Project Cadmus employs "Damocles Class Missiles", which were used to fire directly into the space-based Watchtower of the League to preemptively start a war between superhumans. The use of them is explicitly because Cadmus felt they could not trust the league to continue to protect the people of the world.
* In ''WesternAnimation/JusticeLeagueCrisisOnTwoEarths'', the Crime Syndicate has one they intended to use to control their alternate earth. It was even named Project Damocles.
* ''WesternAnimation/TheAvengersEarthsMightiestHeroes'' villain Kang the Conquerer travels from the future in his ship, which, in his bid to conquer present-day Earth, is referred to as Damocles Base which is shaped like a giant sword.
* In the ''WesternAnimation/TransformersPrime'' episode ''[[Recap/TransformersPrimeS2E19TheHumanFactor The Human Factor]]'', Silas (who at the time became a cyborg called [[IncrediblyLamePun CYLAS]]) and Megatron pull a VillainTeamUp. Their EvilPlan was to use a KillSat called ''Damocles'' to kill the {{Token Human}}s.
** Earlier, it is revealed that Silas was discharged from the military for creating Damocles.

[[folder:Real Life]]
* The TropeNamer is the myth of Damocles and King Dionysios from ancient Greece. Damocles, a low commoner, held his king, Dionysios, in extremely high regard and was very supportive of his rule and life, thinking his life as a king and ruler must be the grandest of all. Hearing about this, Dionysios [[ATasteOfPower invited Damocles to dine with him]], but when Damocles arrived, Dionysios had installed a sword just above Damocles' place in the room, hanging by a hair of a horse' mane. Despite being with his idol as an equal, Damocles couldn't enjoy the feast at all, being so nervous about the sword that he couldn't eat, drink or talk. Dionysios asked him if he enjoyed their meal, and Damocles answered that, in truth, it had been horrible and paranoia-inducing. To that, the king had one answer:
--> ''[[WithGreatPowerComesGreatResponsibility Now you know how a king and tyrant feels every second of his life. Go home, and cherish your freedom.]]''
* The trope is also deployed a more metaphorical sense during the annual state opening of Parliament in the United Kingdom. At Westminster, the British Monarch puts on his royal regalia in a room where the execution warrant of Charles I is prominently displayed--just to remind His or Her Majesty who's the boss around here.
* MutuallyAssuredDestruction. Advances in weapons technology, such as nuclear weapons, were ''supposed'' to bring about an end to armed conflict in the traditional sense. It.... well... KINDA worked....
** International relations studies term this the [[http://en.wikipedia.org/wiki/Stability-instability_paradox stability-instability paradox.]] The fact that both sides have the ability to utterly annihilate one other severely limits the plausible range of actions both sides can do in international diplomacy. On one hand, it means no WorldWarThree because the big powers won't make moves with the intent to go to war (it is assumed that both sides value their own survival more than they do the destruction of the other). On the other hand, this same system means both sides find less direct ways to fight the other side (i.e., via proxy wars with third and fourth parties), in addition to all the smaller pre-existing grudges otherwise-irrelevant parties have with one another which neither superpower can fully stop because the amount of power needed to get one side or the other to heel cannot be used without threat from the other superpower, who by and large cannot risk letting the first have its way.
* The inventor of the [[GatlingGood Gatling gun]], Richard Gatling, thought his invention would serve this purpose, hoping that such a terrible weapon would prevent wars. Or at least end them quicker; in those days, soldiers in prolonged conflicts tended to die from disease.
** He partially succeeded. [[GallowsHumor A smaller percentage of soldiers died from disease.]]
* The closed-shop structure of North American sports leagues (no promotion/relegation system so generally the same teams compete year to year; mutually-recognized territorial rights means most cities save really big ones like New York only have one team in the local market) means that the only ways a city that doesn't have a team but wants one is either get the league to grant an expansion franchise or entice a currently-existing team to relocate. With the Big Four leagues (MLB, NBA, NFL, NHL) already having at least 30 teams each, relocation is generally considered the more likely path. This means that team owners have a large bargaining advantage when it comes to negotiating with the host city regarding stadium leases and ''especially'' public funding for new ones - the sword over the city's head is the chance that the team may pack up and move. A particularly prominent example is the NFL between 1995 and 2015, when there were no teams in Los Angeles after the Rams moved to St. Louis and the Raiders moved back to Oakland - this time period was marked by varying degrees of subtlety about [=SoCal=] in public funding negotiations for stadium renovations or even entire new ones[[note]]True, San Diego had the Chargers, but they're three hours away in a city that pales on a national scale to LA[[/note]].