Decepticon
Encyclopedia
The Decepticons are usually depicted as the antagonists in the fictional universes of the Transformers stoyline and related comics and cartoons, and the enemies of the Autobot
Autobot
Autobot, a faction of sentient robots from the planet Cybertron, are usually the main protagonists in the fictional universe of the Transformers, a collection of various toys, graphic novels, paperback books, cartoons and movies first introduced in 1984. In all but one Transformer story, the...

s and the University of California Davis Aggies. The villains take many forms, and have many different origins and stories across the numerous different Transformers media, but in almost all incarnations, they are led by Megatron. They are typically represented by the purple facial insignia they all wear. Primarily, Decepticons have red eyes, while Autobots have blue eyes. They are usually known for their air power, especially since many of them turn into aircraft. They often turn into military vehicles, construction vehicles, and even smaller-than-human-sized objects.

In the Japanese version of the franchise, the Decepticons are called Destron or Deathtron ( Desutoron). The one exception to this naming convention is Car Robots, where the sub-group referred to as "Decepticons" in the Robots in Disguise
Transformers: Robots in Disguise
Transformers: Robots in Disguise, known in Japan as , is a Japanese anime television series and serves as a self-contained universe separate from any of the other existing Transformers universes...

adaptation, is known in Japan as the Combatrons (the Japanese name of the G1 subgroup known as the Combaticons). The overall name of the Robots in Disguise villain faction is Destronger. However, the Japanese Version of Transformers Animated uses Decepticon (ディセプティコン).

Marvel Comics

In the Marvel comic continuity, it was established that the Decepticons came in and out of the gladiator pits on Cybertron. Early on, the leadership of the Decepticons constantly changed due to their tendency to kill and replace their leaders. It would not be until a lowly Decepticon affiliated gladiator named Megatron assumed the throne that the Decepticons became a true threat to the rest of the population of Cybertron.

While Megatron was the primary leader, other Decepticons had prominent roles as leaders of the group. Shockwave
Shockwave (Transformers)
Shockwave is the name of several fictional characters in the various Transformers series. Throughout his incarnations, he is usually distinguished by a laser cannon in lieu of one of his hands and his distinctive face, which is featureless save a single robotic eye...

, Scorponok
Scorponok
Scorponok is the name shared by several fictional characters in the various Transformers universes. All are Decepticons that turn into Scorpoins.- Transformers: Generation 1:...

, Bludgeon
Bludgeon (Transformers)
Bludgeon is the name of several fictional characters in the Transformers universes. For trademark reasons, he is now marketed by Hasbro as Decepticon Bludgeon. They are all Decepticon warriors who turn into tanks.-Transformers: Generation 1:...

, and Ratbat
Ratbat
Ratbat is the name of several fictional characters who appeared in various Transformers universes.-Transformers: Generation 1:As is the case with many Transformers characters, the various continuities in which Ratbat has appeared have portrayed him widely differently in terms of size, personality,...

 all led the Decepticons, often overthrowing Megatron in the process or taking over the group during the period when Megatron was believed dead.

In the G2 Marvel series (which continues from the G1 Marvel series), it is stated that the Decepticon forces on Cybertron underwent a massive split in the wake of Megatron's disappearance when Megatron, Optimus Prime, and their respective troops crashed on Earth. The smartest, strongest, and most intelligent Decepticons left Cybertron to colonize nearby galaxies, leaving a token leadership of overly cruel and duplicitous Decepticons to control Cybertron. These Decepticons who left their homeworld became "The Second Generation" Decepticons, who were led by the villainous Liege Maximo. On the final page of the last issue, the Liege Maximo indicates that the Decepticons and all their descendants came from him, which indicates that he is the original founder of the Decepticons.

Animated series

In the original animated series continuity, the Decepticons owe their warlike ways to their faction's origin as military hardware robots, created by the five-faced aliens, the Quintessons
Quintessons
Quintessons are fictional aliens from the Transformers universe. Within the TV series, they are the creators of the Transformers, although in most other fictional universes featuring the Transformers, they have no such status...

, while the Autobots were designed as consumer goods. Following the rebellion that forced the Quintessons off the planet, the Decepticons - as they named themselves - lusting for power, began a civil war. The Autobots could not hope to match the superior firepower and battlefield powers of the Decepticons, and instead turned to stealth, developing the art of transformation, modifying their bodies so that they could assume other forms. With this additional power, the Autobots were able to win the conflict, and a period of peace began, known as the Golden Age of Cybertron, when energy was plentiful and the planet shone with a golden hue.

Working in secret, the Decepticons also developed transformation technology, along with new robot-mode flight powers, and, under the command of one of the first of this new breed, Megatron, they attacked one of the capital's outer cities, killing the current Autobot leader. As the knowledge of this act was not made public, younger robots continued to idolize these powerful new flying robots - until one such young robot, Orion Pax, was duped by Megatron into allowing him access to an energy storage facility. Megatron turned on Pax and fatally injured him, but the ancient Autobot, Alpha Trion
Alpha Trion
Alpha Trion is a fictional character in the various Transformers universes. Alpha Trion is one of the Thirteen Primes, thus all his portrayals are considered to be the same individual. He is generally depicted as an ancient mechanoid with a link to Optimus Prime...

, then rebuilt Pax into the first of a new, battle-hardy breed of Autobot - now, he was Optimus Prime
Optimus Prime
Optimus Prime is a fictional character from the Transformers franchise. Prime is the leader of the autobots, a faction of transforming robots from the planet Cybertron. The autobots are constantly waging war against a rival faction of transforming robots called Decepticons...

, leader of the Autobots, who led them against Megatron and the Decepticons as the civil war erupted once more.

After five million years, Cybertron was nearly depleted of all its energy when the Decepticons received word that the Autobots were planning to search for new energy resources. Following the Autobot ship, the Ark
Ark (Transformers)
The Ark is an Autobot spacecraft in the Transformers Universe. It has appeared as a central fixture of the Transformers storyline ever since its creation, as the Autobots main method of transport to Earth and as a base once they arrive....

, in their ship, the Nemesis, the Decepticons boarded the Ark and engaged the Autobots on their ship. Unfortunately, the Ark drifted too close to Earth and crashed landed in a volcano. All the occupants of the Ark went into emergency stasis, while the Decepticons on the Nemesis ejected to South America. There, they scanned the forms of local insects, becoming the Insecticons
Insecticons
Insecticons is the name given to a sub-group of fictional characters in the Transformers Universes, referred to as Insectrons in the Japanese version. The name was also used for several fictional characters in the Transformers Universes...

. After 4 million years, the volcano the Ark was wedged in, erupted in Earth year 1984, restarting its computer, Teletraan I
Teletraan I
Teletraan I is the name of several fictional characters in several Transformers universes. Teletraan I is usually the Autobots' computer on board their spaceship called the Ark.-Transformers: Generation 1:...

. Sending out Spy Satellites, Teletraan created alternative forms out of Earth vehicles for any transformers caught in its scanning beam (Like F-15 Eagle
F-15 Eagle
The McDonnell Douglas F-15 Eagle is a twin-engine, all-weather tactical fighter designed by McDonnell Douglas to gain and maintain air superiority in aerial combat. It is considered among the most successful modern fighters with over 100 aerial combat victories with no losses in dogfights...

s for Skywarp
Skywarp
Skywarp is the name of several fictional characters in the Transformers toy line. He is usually depicted as a black or purple Decepticon jet with teleportation powers.-Transformers: Generation 1:...

 and a Semi-trailer truck
Semi-trailer truck
A semi-trailer truck, also known as a semi, tractor-trailer, or articulated truck or articulated lorry, is an articulated vehicle consisting of a towing engine , and a semi-trailer A semi-trailer truck, also known as a semi, tractor-trailer, or (in the United Kingdom and Ireland) articulated truck...

 for Optimus Prime
Optimus Prime
Optimus Prime is a fictional character from the Transformers franchise. Prime is the leader of the autobots, a faction of transforming robots from the planet Cybertron. The autobots are constantly waging war against a rival faction of transforming robots called Decepticons...

). The Decepticons awakened first but later the Autobots did too, thanks to Starscream's carelessness.

By the Earth year 2005, however, the Decepticons had succeeded in completely conquering Cybertron. In a final attempt to destroy the remaining Autobots they attacked Autobot City on Earth but were defeated. On their way back to Cybertron
Cybertron
Cybertron is a fictional planet, the homeworld of the Transformers in the various fictional incarnations of the metaseries and toyline by Hasbro. In the Japanese series, the planet is referred to as "Cybertron" pronounced as セイバートロン Seibātoron...

 Astrotrain
Astrotrain
Astrotrain is the name of three fictional characters in the various Transformers universes. All are Decepticons who can assume the form of a space shuttle.-Transformers: Generation 1:...

 encountered difficulty leaving Earth's gravity due to an over-large payload. Starscream
Starscream
Starscream is a fictional character in the Transformers franchise. He is one of the most prolific characters in the Transformers fictional work, appearing in almost all incarnations of the story. Starscream is usually portrayed with the same characterization...

 convinced the others to jettison all the damaged and dying decepticons, including Megatron. Megatron was then found by Unicron
Unicron
Unicron is a fictional character from the Transformers universe and toyline. Created by Floro Dery, he was introduced in the 1986 animated film The Transformers: The Movie as the film's main antagonist. Unicron is a prodigiously large robot whose scale reaches planetary proportions, and he is also...

 who offered to rebuild him in return for destroying the Autobot Matrix of Leadership
Autobot Matrix of Leadership
The Matrix of Leadership or Creation Matrix in the fictional Transformers universes is the Autobot talisman of legend, passed down from leader to leader. It consisted of an oval-shaped container, holding a glowing crystal. To open the Matrix is to release an unpredictable wave of power from the...

. Megatron was reformed into Galvatron
Galvatron
Galvatron is the name of several fictional Transformers, most often the recreated version of Megatron, the Decepticon leader. He was voiced by Leonard Nimoy in the 1986 Transformers movie, and then by Frank Welker in season 3 and 4 of the animated television series. Since then, other Transformers...

 who returned to Cybertron
Cybertron
Cybertron is a fictional planet, the homeworld of the Transformers in the various fictional incarnations of the metaseries and toyline by Hasbro. In the Japanese series, the planet is referred to as "Cybertron" pronounced as セイバートロン Seibātoron...

, destroyed Starscream for his treacherry and reassumed command of the Decpticons. Galvatron
Galvatron
Galvatron is the name of several fictional Transformers, most often the recreated version of Megatron, the Decepticon leader. He was voiced by Leonard Nimoy in the 1986 Transformers movie, and then by Frank Welker in season 3 and 4 of the animated television series. Since then, other Transformers...

 then attempted to use the Matrix against Unicron
Unicron
Unicron is a fictional character from the Transformers universe and toyline. Created by Floro Dery, he was introduced in the 1986 animated film The Transformers: The Movie as the film's main antagonist. Unicron is a prodigiously large robot whose scale reaches planetary proportions, and he is also...

, provoking him into attacking Cybertron
Cybertron
Cybertron is a fictional planet, the homeworld of the Transformers in the various fictional incarnations of the metaseries and toyline by Hasbro. In the Japanese series, the planet is referred to as "Cybertron" pronounced as セイバートロン Seibātoron...

. The attack coupled with the temporary loss of Galvatron
Galvatron
Galvatron is the name of several fictional Transformers, most often the recreated version of Megatron, the Decepticon leader. He was voiced by Leonard Nimoy in the 1986 Transformers movie, and then by Frank Welker in season 3 and 4 of the animated television series. Since then, other Transformers...

 shattered the decepticon forces, allowing the Autobots to reclaim their home planet. The Decepticons fled to the planet Chaar, a world of ash and ruin, where they struggled to survive until Galvatron returned to them and reorganized them into a fighting force, battling to take back Cybertron.

IDW Publishing

The origins of the Decepticons in the IDW continuity would be explored in The Transformers: Megatron Origin
The Transformers: Megatron Origin
The Transformers: Megatron Origin is a comic book limited series by IDW Publishing exploring the origin of Megatron in its rebooted G1 universe...

, which confirmed Megatron as their founder in this timeline. On the run after an attack on an Autobot Senator after a mining dispute, Megatron stumbled onto underground gladiator games in the state of Kaon and quickly became one of its rising stars. However, it only truly became more than this when Ratbat
Ratbat
Ratbat is the name of several fictional characters who appeared in various Transformers universes.-Transformers: Generation 1:As is the case with many Transformers characters, the various continuities in which Ratbat has appeared have portrayed him widely differently in terms of size, personality,...

, seeing an opportunity for profit, dispatched Soundwave
Soundwave (Transformers)
Soundwave is the name of several characters in the various series Transformers series. His most famous disguise is that of a microcassette recorder and has an iconic voice done by a vocoder.-Transformers: Generation 1:...

 to arm the gladiators. Megatron's forces then began to commit acts of terrorism increasing in scale and daring, attracting the attention of Sentinel Prime
Sentinel Prime
Sentinel Prime is the name of several fictional characters in the various Transformers series. First mention of Sentinel Prime was in issue #65 of the US Marvel Comics Transformers series, where he was mentioned to hold the Autobot Matrix of Leadership before Optimus Prime. Sentinel Prime has since...

. Kidnapping Senator Decimus as a symbol (with the help of new airborne recruit Starscream
Starscream (Transformers)
Starscream is a fictional character in the Transformers franchise. He is one of the most prolific characters in the Transformers fictional work, appearing in almost all incarnations of the story. Starscream is usually portrayed with the same characterization...

) Megatron issued a rallying call to the gladiators and their supporter, promising to unite them under one badge and make the whole planet their arena. Prime's forces then found and arrested them en masse. This was all part of Megatron's plan: a supposedly informant Starscream massacred the Autobot Senate and freed the prisoners, signalling revolution and anarchy in Kaon. Megatron eventually killed Prime one-on-one as a symbol, and the Decepticons were forged.

In this continuity, there are a number of differences to the traditional norm. The Decepticons are no longer based on Cybertron due to its devastation by rogue scientist Thunderwing
Thunderwing
Thunderwing is the name of several fictional characters from the Transformers series. Introduced in 1989, he was a major villain in the Marvel Comics Transformers series. Although Thunderwing was created after the US Transformers television series ended, the character of Black Shadow did appear in...

. Instead, they have spread out through the galaxy, using their transforming abilities to infiltrate target worlds (such as Earth or Nebulos) disguised as local vehicles and equipment. They then use their modes to create conflict, leading to complete anarchy as the world's political and social systems collapse. The Decepticons then move in and harvest the world's raw resources. How the world is pacified is unknown, although The Transformers: Spotlight issue on Sixshot
Sixshot
Sixshot is the name of two fictional characters from the various Transformers series. Introduced in 1987, Sixshot appeared in the last few episodes of the original US Transformers animated series, voiced by Neil Ross. His defining gimmick was that he had six different forms, not two like a normal...

 revealed he is often sent in to complete the destruction of entire worlds. As in other continuities, Megatron is in command, and thus far has had to deal with the rebellion of Starscream
Starscream (Transformers)
Starscream is a fictional character in the Transformers franchise. He is one of the most prolific characters in the Transformers fictional work, appearing in almost all incarnations of the story. Starscream is usually portrayed with the same characterization...

's Earth infiltration unit and the reemergence of Thunderwing, as well as moving on to Earth in order to harvest the extremely powerful Energon variant Ore-13, something which promises to give the Decepticons a significant edge over the Autobots.

Transformers: Robots in Disguise

In this continuity, the Decepticons were not the name of the evil faction, but rather a sub-faction created by Megatron. The main faction was instead the Predacons (carrying the name of the main villains over from Beast Wars
Beast Wars
Transformers: Beast Wars is a Transformers toyline released by Hasbro between 1995 and 2000, and a Daytime Emmy Award winning full-CG animated television series spawned by it that debuted in 1996...

), who transformed into mechanical animals. Realising that their ability to travel as Earth vehicles gave the Autobots an edge in stealth, Megatron decided to take drastic action.

Megatron recovered the protoforms of six Autobots that had crashed to Earth some time before looking for Fortress Maximus
Fortress Maximus
Fortress Maximus is the name of several fictional characters from several of the various Transformers universes. Fortress Maximus appeared in the season 4 finale of the US Transformers animated series voiced by Stephen Keener. He was one of the stars of the Japanese Transformers: Headmasters...

. Scanning them with vehicle modes at a military base and infusing them with a fraction of his spark energy to ensure their new loyalty, the first five became the Commandos. But when Megatron tried to scan a tanker truck as an alternate mode for the leader Scourge
Scourge (Transformers)
Scourge is the name of several fictional characters from the Transformers series. He first appeared as one of the central villains in the 1986 film The Transformers, voiced by Stan Jones. He also regularly appeared in the animated Transformers series and Transformers comic books. Since then other...

, Optimus Prime was scanned as well, resulting in much of Prime's personality being scanned as well. With an infusion of Megatron's spark energy to complete the concoction, Scourge was born, emerging from his pod as a dark twin of Optimus Prime, who proved that Megatron's programming had over-ridden any Autobot goodness within him. Appointed leader of the new "Decepticons", they quickly established themselves as a force to be reckoned with.

The newly created Decepticons would try many schemes over the course of the series, including attacking various dams and faking their defection to the Autobots. But their leader, Scourge, had grander ambitions in mind. The copy of Optimus' personality had been warped by Megatron's evil influence, but the individuality of Optimus remained and Scourge now wanted to control both Predacons and Decepticons. He would seize his chance when Fortress Maximus was awakened, directing him to destroy Galvatron
Galvatron
Galvatron is the name of several fictional Transformers, most often the recreated version of Megatron, the Decepticon leader. He was voiced by Leonard Nimoy in the 1986 Transformers movie, and then by Frank Welker in season 3 and 4 of the animated television series. Since then, other Transformers...

 (Megatron's new form). The attempt failed and Galvatron took a terrible revenge - he stripped the Decepticons of their individuality, turning them into little more than drones. After Galvatron's defeat by Omega Prime
Omega Prime
Omega Prime is a fictional character from the Transformers toyline. He is the combined form of Optimus Prime and Ultra Magnus.-Transformers: Robots in Disguise:...

, the Decepticons were among those sent back to Cybertron for imprisonment, except for Sky-Byte
Sky-Byte
Sky-Byte is the name of several fictional characters in the various Transformers universes. He is usually a Predacon who turns in a mechanical shark.-Transformers: Robots in Disguise:...

.

Unicron Trilogy

The Decepticons appeared as mostly jets and military vehicles.

In the Unicron Trilogy continuity, the early history of the war is not expounded upon. The Decepticons, however, remain the main antagonists, with whom the Autobots have been warring for quite some time. The enslavement of the small, power-enhancing Mini-Cons has long been a major goal of the Decepticons, and the Mini-Cons are seen as key to winning the war.

Near the end of Armada, the Autobots and Decepticons join forces to defeat the planet-devouring Unicron, and the beginning of Energon sees them as uneasy allies. Many return to Megatron's side when he returns.

Cybertron sees a much smaller Decepticon force than the previous two series, and what has become of most of the survivors of the earlier series remains unknown. As Megatron's true plans are discovered, most of the Decepticons, unwilling to be sacrificed as pawns as their leader seeks to remake the universe, again battle a common foe alongside the Autobots. The end of the series sees three of the comic-relief characters, with a reluctant Thundercracker, desiring to begin a new Decepticon force, and take off in a makeshift rocket. It makes it as far as Mars before it crashes, as the ending credits montage of the final episode shows. The foursome survives, however. The fates of the other surviving Decepticons remains unknown, though evidence of Starscream's survival is discovered.

Transformers

The Decepticons make an appearance in the 2007 the Transformers live-action film. They include Megatron, Starscream
Starscream (Transformers)
Starscream is a fictional character in the Transformers franchise. He is one of the most prolific characters in the Transformers fictional work, appearing in almost all incarnations of the story. Starscream is usually portrayed with the same characterization...

, Frenzy
Frenzy (Transformers)
Frenzy is the name of several fictional characters in the various Transformers universes. Wired Magazine once nominated him as one 12 most ridiculous Transformers of all time.-Transformers: Generation 1:...

, Blackout
Blackout (Transformers)
Blackout is the name of several different fictional characters in the various Transformers universes.-Transformers: Generation 1:Blackout was one of a team of two Micromaster Combiners. They came with a Gepard air defense vehicle that could transform to a base...

, Barricade
Barricade (Transformers)
Barricade is the name of four fictional characters in the various Transformers universes.-Transformers: Generation 1:Barricade first featured in 1990 as part of a Decepticon race track patrol team, his vehicle mode being a Formula One racing car....

, Scorponok
Scorponok
Scorponok is the name shared by several fictional characters in the various Transformers universes. All are Decepticons that turn into Scorpoins.- Transformers: Generation 1:...

, Brawl
Brawl (Transformers)
Brawl is the name given to several fictional characters in the various Transformers universes. He is sometimes called "Decepticon Brawl" in the toy line for trademark purposes.-Transformers: Generation 1:...

 and Bonecrusher
Bonecrusher (Transformers)
Bonecrusher is the name of several fictional characters in the various Transformers universes.-Transformers: Generation 1:Bonecrusher is a member of the Constructicons. He is a brawler by nature and specialises in demolitions work...

. The Movie Prequel comic by IDW Publishing
IDW Publishing
IDW Publishing, also known as Idea + Design Works, LLC and IDW, is an American publisher of comic books and comic strip collections. The company was founded in 1999 and has been awarded the title "Publisher of the Year Under 5% Market Share" for the years 2004, 2005 and 2006 by Diamond Comic...

 would reveal their origins. Originally Optimus Prime and Megatron ruled Cybertron together, due to the power of the Allspark, a mysterious device that could give life to Transformers - and keep Cybertron itself alive. Eventually, Megatron began to desire its power for himself and assembled a like-minded army of separatists - the Decepticons. Megatron soon struck, and Cybertron became embroiled in civil war. This would later seem to be changed, however, by the sequel films, where it is revealed that Sentinel Prime
Sentinel Prime
Sentinel Prime is the name of several fictional characters in the various Transformers series. First mention of Sentinel Prime was in issue #65 of the US Marvel Comics Transformers series, where he was mentioned to hold the Autobot Matrix of Leadership before Optimus Prime. Sentinel Prime has since...

 was the leader of the Autobots and The Fallen
Fallen (Transformers)
The Fallen is a fictional character in the Transformers universes. According to Hasbro, he was formerly known as Megatronus Prime, and is a multiversal singularity, meaning that while he exists across the multiverse, he has no alternate-universe counterpart.-Character history:Although the Fallen's...

 the leader of the Decepticons when the war broke out. Optimus would only take command after Sentinel was seemingly killed in action and Megatron served as The Fallen
Fallen (Transformers)
The Fallen is a fictional character in the Transformers universes. According to Hasbro, he was formerly known as Megatronus Prime, and is a multiversal singularity, meaning that while he exists across the multiverse, he has no alternate-universe counterpart.-Character history:Although the Fallen's...

's field commander due to the latter's incapacitation. The subsequent prequel novel Transformers: Ghosts of Yesterday
Transformers: Ghosts of Yesterday
Transformers: Ghosts of Yesterday, is a prequel novel to the Michael Bay Transformers film. It was written by Alan Dean Foster, based on a story by David Cian.-Plot summary:...

revealed that Starscream seized command of the Decepticons after Megatron's disappearance.

Like the Autobots, the Decepticons are designed to look more organic in the movie. While the Autobots have a more human-like physiology, the Decepticons are more monstrous and insect-like in appearance. In Transformers: Revenge of the Fallen
Transformers: Revenge of the Fallen
Transformers: Revenge of the Fallen is a 2009 American science fiction-action film directed by Michael Bay and produced by Steven Spielberg. It is the sequel to the 2007 film Transformers and the second installment in the live-action Transformers series...

it is revealed that The Fallen
Fallen (Transformers)
The Fallen is a fictional character in the Transformers universes. According to Hasbro, he was formerly known as Megatronus Prime, and is a multiversal singularity, meaning that while he exists across the multiverse, he has no alternate-universe counterpart.-Character history:Although the Fallen's...

, a Prime who turned evil, is the First leader and founder of the Decepticons, which would seem to imply the Decepticons were originally Autobots who turned evil. In the final battle in the second movie, there are many Decepticon casualties including Devastator (destroyed by a rail gun), Mixmaster (cut in half and his head stomped off by Jetfire), Rampage (killed by Bumblebee), Ravage (Stripped from his spine by Bumblebee), Scrapper and Long Haul (killed by an airstrike), Scorponok (head crushed by Jetfire) and the Fallen himself whose spark is ripped out and crushed by Optimus Prime. Also killed in the movie are Sideways and Demolisher, killed at the beginning by Optimus and Sideswipe. Megatron officially takes full command of the Decepticons at this point, swearing vengeance.

The Decepticons return in Transformers: Dark of the Moon with the plan to use a space bridge
Space Bridge
In Marvel Comics' Transformers comic and cartoon, the Space Bridge is a device used by the Decepticons to travel between different planets, usually between Cybertron and Earth.-Generation One:...

 to bring an army to Earth and transport Cybertron into orbit to rebuild the planet with Earth's natural resources and human population as slaves. Megatron and Sentinel Prime
Sentinel Prime
Sentinel Prime is the name of several fictional characters in the various Transformers series. First mention of Sentinel Prime was in issue #65 of the US Marvel Comics Transformers series, where he was mentioned to hold the Autobot Matrix of Leadership before Optimus Prime. Sentinel Prime has since...

 planned this a long time ago, planning to meet on Earth before Megatron went after the Allspark and ended up frozen and the Ark was shot down by Decepticon fighters (few Decepticons knew of the plan) and crashed on Earth's Moon in 1961. This was detected by the Americans and the Russians and the space programs were created to reach the ship and study it. However, by 1963 the Decepticons had raided the Ark and removed all but five of the pillars and hid them on the Moon along with an army of hundreds of Decepticons, awaiting the time that the pillars would be used. After humans successfully reached the Moon and explored the ship, Soundwave
Soundwave (Transformers)
Soundwave is the name of several characters in the various series Transformers series. His most famous disguise is that of a microcassette recorder and has an iconic voice done by a vocoder.-Transformers: Generation 1:...

 and Laserbeak
Laserbeak
Laserbeak is the name given to several fictional characters in the various Transformers universes. He is almost always a mechanical bird, and is partnered with Soundwave.-Transformers: Generation 1:...

 approached various humans including Dylan Gould's
Dylan Gould
Dylan Gould is a fictional character from the Transformers universe. He is the CEO of the Hotchkiss Gould Investments, and also collects wealthy cars to "keep his sanity". He was the employer of Carly Spencer, and is fond of her, happening to call her "my duchess"...

 father to get them to shut down the American and Russian space programs. The Decepticons established a network of human collaborators who kept the humans from noticing the Decepticons actions on the Moon, later led by Dylan Gould. After a human collaborator named Alexi Voshkod leads NEST to Chernobyl
Chernobyl
Chernobyl or Chornobyl is an abandoned city in northern Ukraine, in Kiev Oblast, near the border with Belarus. The city had been the administrative centre of the Chernobyl Raion since 1932....

 where they retrieve an engine part from the Ark, the Decepticons reemerge for the first time since Egypt in the form of Shockwave
Shockwave (Transformers)
Shockwave is the name of several fictional characters in the various Transformers series. Throughout his incarnations, he is usually distinguished by a laser cannon in lieu of one of his hands and his distinctive face, which is featureless save a single robotic eye...

 and his Driller who attack, but retreat. This leads the Autobots to retrieve Sentinel and the remaining space bridge pillars and revive him and as this is going according to plan, Megatron orders Laserbeak to kill all the human collaborators but Dylan Gould which he does. Before he's killed, one of the collaborators named Jerry Wang alerts Sam Witwicky to this and he alerts NEST which ignores it. Sam and Seymour Simmons find out about the Decepticons plot from pictures a Russian probe got of the Decepticons hiding the pillars and the Dreads are sent to attack the convoy protecting Sentinel, but are killed by Bumblebee, Dino
Mirage (Transformers)
Mirage is any of several distinct fictional characters in the various Transformers series. Mirage is one of the single most re-used names in the Transformers series, and is almost entirely synonymous with characters possessing Formula One racing car alternate modes.-Transformers Generation 1:Some...

, Sideswipe and Ironhide
Ironhide
Ironhide is the name of several different fictional characters in the Transformers universes. According to the original creator of the Transformers names, Bob Budiansky, Ironhide was named after the television series Ironside.-Transformers: Generation 1:...

. After Sentinel reveals his true colors and murders Ironhide, he sets up the pillars in the National Mall
National Mall
The National Mall is an open-area national park in downtown Washington, D.C., the capital of the United States. The National Mall is a unit of the National Park Service , and is administered by the National Mall and Memorial Parks unit...

 and brings the Decepticon army consisting of hundreds of Decepticon soldiers and Decepticon ships to Earth. With the army in hand, the Decepticons promise to bring no war against the human population in exchange that the Autobots must leave Earth. While taking off into the atmosphere, Starscream destroyed the ship, knowing that mankind will resist on their own. Some of the Decepticons scatter around the world to set up the pillars, but most of the army invades Chicago
Chicago
Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...

, devastating the human population and taking over. The Autobots, NEST and a team of mercenaries led by Sam Witwicky and Robert Epps invade Chicago and battle the Decepticon army, aided by the United States Army
United States Army
The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

, and U.S Air force. The group manages to take out much of the army including Laserbeak (killed by Sam Witwicky and Bumblebee), the Driller (killed by Optimus), Starscream (killed by Sam Witwicky), Soundwave (killed by Bumblebee), Barricade (killed by NEST) and Shockwave (killed by Optimus) and disrupt the Control Pillar, forcing Sentinel into battle. The combined human and Autobot forces overwhelmed Sentinel and his remaining forces and Tomahawk missiles destroy most of the Decepticon fighters causing Sentinel to flee before engaging Optimus one on one as Dylan Gould reactivates the space bridge. Sam Witwicky kills Gould and Bumblebee and Ratchet destroy the Control Pillar, causing Cybertron to implode and ruining the Decepticon plan. Also, the remaining Decepticon ships are sucked up into Cybertron by the space bridge and are presumably destroyed with the planet. Sentinel nearly kills Optimus, but Megatron, convinced by Carly Spencer that he would end up working for Sentinel, saves Optimus and incapacitates Sentinel. Megatron offers a truce between the Autobots and Decepticons after Cybertron is destroyed as long as he's in charge of the Decepticons again, but Optimus refuses and kills Megatron and Sentinel. While the loss of human life in Chicago is massive, the battle is a major victory for the Autobots as they eliminated most of the Decepticon army on Earth despite there being some still scattered around the globe and the entire Decepticon command structure was destroyed with all of its members killed in the battle.

Transformers Animated

In Transformers: Animated the Decepticons are usually bigger than the Autobots and usually turn into jets and military vehicles. It takes a group of Autobots to defeat one Decepticon and almost all Decepticons have red eyes and can fly. Most Decepticons in the series are similar to the original G1 series. In the Animated Series Blitzwing
Blitzwing
Blitzwing is the name of several fictional characters in the various Transformers series. He is always depicted as a Decepticon with two alternate forms, that of a jet and that of a tank...

, for example, retains his triple changer modes of a tank and jet and also retains his G1 tan and purple color scheme.

This series depicts a Decepticon force that is far from what it apparently once was, with Megatron having been chasing the Allspark for millions of years prior to the series' beginning. The Decepticons have been "wandering the periphery" for some time, but have been driven off of Cybertron long ago. These Decepticons see themselves as 'freedom fighters,' seeking to throw off 'Autobot tyranny,' and their plans tend to revolve around returning to Cybertron with the means to retake it.

Transformers: Timelines

A series of stories printed by Fun Publications, set in a variety of continuities, the Decepticons of alternate worlds can vary greatly from the classics Decepticon image. In the Transtech storyline the Autobots and Decepticons are merely political factions on a Cybertron which never broke out into war. Lines between good and evil are more blurred.

In the Shattered Glass storyline, a group of Decepticons, led by Megatron, are the mirror images of the personalities of most Decepticons. In this world the Decepticon logo is red, and worn by heroic Transformers who seek to protect the weak and oppressed from the evil Autobots.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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