El Cid Ploy

"Give me your armor to put on my shoulders;

The Trojans might suppose I was you,

Hold back, and give the Acheans' sons a breather,

For breathing spells in war are very few."

- Patroclus, The Iliad

Whether for good or for the moment, a major leader has died or gone into Ten Minute Retirement. He's likely to be a Supporting Leader or the Big Good / Big Bad -- someone highly visible, whose presence alone could turn the tide of the battle. If he's gone, it would crush the morale of the Redshirt Army. So his team pretends he's still around, by creating the visual effect of his presence-- dressing someone in his armor, finding someone that looks a bit like him, even toting his corpse around and treating it like it's alive. The ploy doesn't necessarily have to be performed for a battle-- any instance of faking the image of a leader or champion to maintain order counts.

There are two twists on this that sometimes show up. Often, the person pretending to be El Cid will get himself killed, having an even more demoralizing effect. Less commonly, the fake El Cid may try to assume the real one's identity, in which case this overlaps with Dead Person Impersonation (and if he does an especially good job, Becoming the Mask).

Compare Of Corpse He's Alive, which this overlaps with if it is played for laughs. Do not confuse with Dead Person Impersonation, which involves assuming someone's identity instead of their image. Compare Emergency Impersonation.

Anime and Manga

 * In Death Note the Kira investigation team do this to . Of course they didn't know that.
 * In the backstory of Ooku: the Inner Chambers, the initial response to Shogun Tokeguwa Iemitsu's death from the RedFaced Pox was to hide his death until a male heir could be sired upon his bastard daughter. The deception lasted around a decade before said daughter took the reins and presented herself as Shogun Iemetsu.
 * Although numerous people have worn Zero's trademark outfit in Code Geass, this is played with in the finale.
 * In Ghost in The Shell Stand Alone Complex, a charismatic "hero of the revolution" of some South American country has a strange reputation for surviving assassination attempts; nearly all the people killed looked exactly like him, leading the experts to conclude that he has a ton of body-doubles. In fact, the guy did die, and his Japanese partners have been continually replicating him with imitation clones so that nobody will figure out he's dead.

Film

 * The Trope Namer is El Cid, the 1961 Hollywood epic about a Spanish national hero from the late eleventh century. After taking a mortal wound on the eve of a decisive battle against invading Moors at the city of Valencia, he makes his wife swear that she will make sure he rides into battle the next morning no matter what. At dawn, his body is dressed in his armor and strapped onto his horse, and as the narrator puts it, El Cid "rode out of the gates of history into legend." In reality, El Cid died nine years after conquering Valencia. The ending of the film appears to have been made up by the screenwriters.
 * The Akira Kurosawa movie Kagemusha is this trope gone full-time.
 * This would have been the ending of Terminator: Salvation if there hadn't been an Internet Backdraft when it leaked out.
 * The plot of Moon Over Parador is a mix of this with Prince and Pauper.
 * This is how A Knights Tale gets started.
 * Hair.

Literature

 * Robert Heinlein's novel Double Star. When politician John Joseph Bonforte is kidnapped by his political opponents, a lookalike actor is chosen to stand in for him to keep his coalition together and prevent the kidnappers from winning by default.
 * The Prisoner of Zenda and all its adaptations, such as the movie Dave.
 * In Brisinger the Varden use a magically created illusion to stand in for Eragon while he's busy with dwarfish politics, to prevent the Empire from attacking them while they're riderless.
 * In the Young Jedi Knights book series, the Emperor Palpatine has apparently been resurrected (yet again) to lead the Second Imperium. He appears through holograms to address his subjects, but near the end of the series we find that he was Dead All Along, and was actually being HoloShopped? by his bodyguards from Return of the Jedi out of Stock Footage from when he was alive and ruling.
 * In Robert E Howard's Conan the Barbarian novel "The Hour of the Dragon", King Conan is struck down by sorcery before a battle and his advisers pull an El Cid Ploy. Which fails, because the stand-in doesn't have Conan's battle experience and falls for a trap. (Conan himself asked them to strap him into his saddle so he could still lead the charge.)
 * The Hand of Thrawn duology has a Big Bad Triumvirate working to make it look like Grand Admiral Thrawn, who'd been dead for ten years, had come Back From the Dead. This really does combine this trope and Dead Person Impersonation.
 * Hilariously enough, they shouldn't have bothered, as Thrawn's own plan for coming Back From the Dead would have started a few weeks later, and it ended up being foiled because of them.
 * The Lloyd Alexander novel The First Two Lives of Lukas-Kasha has La Résistance perpetuate the myth that their greatest king is alive and fighting to frighten their oppressors. In reality, his daughter is in charge, and arguably accomplishing more than her father actually did.
 * In Book Five of Percy Jackson and The Olympians,
 * It's pretty much a direct reference to the classic example from the Iliad mentioned below,
 * In the Chinese classic, Romance of the Three Kingdoms, during the final battle between the forces of Shu and the forces of Wei, Shu Prime Minister and strategic mastermind Zhuge Liang dies from pneumonia. His long-time rival, Wei's Sima Yi, is emboldened by these news, and orders a full assault. However, Zhuge Liang had known he was dying for a long time, and left plans for the contingency in the hands of his deputy, Jiang Wei. His body was propped up on a chariot, his trademark battle-fan in hand, and wheeled out at the forefront of a counterattack. Seeing Zhuge Liang take the field, Sima Yi assumed that he had yet AGAIN walked into one of Zhuge's stratagems, and immediately ordered a full retreat. The Wei army fell back in disarray, and Shu won the day. Thus, it is said that "A dead Zhuge Liang beat a living Sima Yi."
 * In the climactic scene in the second book of the A Song of Ice and Fire saga,
 * Later in the fifth book
 * Near the beginning of the second book of the Codex Alera, the First Lord collapses from working himself nearly to death. Since word of this level of infirmity would give Lord Aquitaine and Lord Kalarus exactly the chance they're looking for to try to take over, Tavi and company have to disguise the fact that he's in a coma. They wind up . Hilarity Ensues.
 * Happens to the eponymous protagonist at least twice in Perry Rhodan. In both cases, his disappearance leaves the post of head of state of the Solar Empire suddenly vacant, so his close friends and assistants employ doubles to fool the public and hold the Empire together. (The main problem with this kind of plot is here that said Empire is otherwise always depicted as a genuine representative democracy...only with a small clique at the top deciding to deceive the constituency about the sudden loss of their elected leader in both these cases and essentially getting away with it.)
 * At the end of Shadow Games, Murgen puts on the Widowmaker Armor after Croaker falls, to rally the troops at the battle of Dejagore.
 * Older Than Feudalism: While Achilles is off having a sulk in The Iliad, his best friend, Patroclus, pretends to be him to rally the Greeks. When Patroclus gets killed by Hector, it demoralizes the Greeks, but brings Achilles back into the fight.

Live Action TV

 * In Buffy the Vampire Slayer, a robot duplicate stands in for Buffy while she's temporarily dead, so that the Slayer's reputation will still scare demons away.
 * Gabrielle disguises herself as the temporarily-incapacitated Xena to use her reputation to try and drive off a warlord.

Oral Tradition

 * Rodrigo Diaz de Vivar, better known as El Cid, is the Trope Namer.
 * When Cú Chulainn was mortally wounded in the middle of battle, he tied himself to a standing stone so he died on his feet. His enemies still believed he was alive, until a crow landed on him. Probably not intended on his part, but still worked.

Real Life

 * When Fidel Castro was having health problems, some people thought that he had actually died and the Cuban government had pulled one of these. He eventually went on television to deny it.
 * Francisco Franco, Ronald Reagan and Kim Jong-Il were suspected of the same thing for a while.
 * This just in, Generalissimo Francisco Franco is still dead.
 * There was a Russian joke that Brezhnev's slowness was a result of him being dead and replaced by remote-control dummy.
 * Allegedly the Scottish King Robert the Bruce was once too sick with what was incorrectly diagnosed as leprosy to lead his army against the English. His lieutenants strapped the incoherent king onto his horse anyway. The English, seeing the by-then Legendary Bruce riding against them panicked and retreated.
 * Paul McCartney. What?
 * Infamously inverted by Mel Carnahan, who was elected official senator of Missouri (with his wife serving in his place) because his name could not be removed from the ballot, despite being dead. His opponent? John Ashcroft.
 * What's a John Ashcroft?
 * Attorney General during the administration of George W Bush.
 * Famous Korean admiral Yi Sun-Sin was on the verge of beating the Japanese navy (for about the 23rd time) when he was struck by a single bullet. He told the few soldiers around him to fight on but not announce his death to the others until the battle was over. They did so and won.

Video Games

 * Mega Man Zero's Copy-X is this Gone Horribly Wrong.
 * Also pulled off in the second game, his Quirky Miniboss Squad (Harpuia in particular) takes control, without revealing to the populace the fact that Copy-X was dead.
 * Mega Man X Command Mission has an unknown reploid taking the armor and weapons of the almost dead hero Massimo.
 * In Infinite Undiscovery, you play as an unassuming and cowardly young lad named Chapell... who just so happens to be a dead ringer for Sigmund, the Great Hero of the People. Sigmund's combat prowess and charisma has caused much of the world to rally behind his efforts to stop The Order Of Chains and their plans, so when he dies in battle, things look bleak. Even with most of the forces intact, without Sigmund, they'd lose the support of the kingdoms... so, of course, Chapell has to take up the mantle of Sigmund, pretending to be him at least long enough to finish the fight!
 * In the first Suikoden game, the leader of La Résistance, Odessa, is killed by imperials while protecting a pair of children. Your party shows up seconds later and kills the imperials. With her dying breath, she admits to being "A woman first, a rebel second", and asks you to dump her body in the nearby waterway, concealing her death so as not to demoralize La Résistance. Nobody really impersonates her, but you keep pretending that she's just off somewhere else being busy at undermining the empire, for quite a long time...
 * Also alluded to in one of Suikoden V's Bad Ends:
 * In Wild Arms XF, the drifter Clarissa reluctantly pretends to be the missing-and-presumed-dead princess Alexia to lead a revolution against the corrupt government.
 * with the twist that they may.
 * And further twisted if . Yeah, it's a Mind Screw.
 * In Age of Empires II, you get to play the trope-naming scenario in the expansion's Spanish campaign. If the enemy reaches the immobile El Cid mounted on his horse, you lose the battle instantly.
 * Horrifically subverted in Jeanne D Arc. After . It is at this point that
 * At the conclusion of Final Fantasy XII,.

Webcomics

 * Happens in Sluggy Freelance when Torg is forced to take the place of Identical Stranger Lord Torgamous de Saxones, who is currently too sick to lead his army into battle.
 * Drow Tales has Val'Sharess Diva'ratrika, who was secretly overthrown by her three daughters in a coup. Rather than broadcast news of her death (which would destabilize the Empire), they pretend she is still alive, and even more recently, dressing someone up as the Empress and parading her through the city. As of the 15 year timeskip at least one daughter has dropped the act and publicly declared that her mother is dead, though obviously not under the real circumstances.

Western Animation
""Michael Eisner's been dead for five years, Ted Turner's just a hologram!""
 * Superman the Animated Series, "Knight Time"; Batman goes missing (Bruce Wayne is mind controlled by Braniac) so Superman wears his costume for a while. Bane - the Bat-villain relying on enhanced strength - was not a happy camper.
 * In Batman the Animated Series, this is Batgirl's origin: dressing up as Batman in an effort to add the Bat's support to Commissioner Gordon's innocence.
 * Smithers and Homer do this in an episode of The Simpsons, since Burns needed to make a speech himself at an investor's meeting and had died due to Homer's bungling. They literally string him up like a dummy, and read his speech from backstage while making his arms flail. The audience bought it completely, and . Smithers even lampshades it: