Great War

The Great War (グレートウォー, Gurēto Wō), sometimes also known as the Fourth Cybertronian War was the most violent outburst of fighting, between the Autobots and Decepticons who have wage their battles for supremacy of Cybertron and the universe. It was the fourth of many large wars to engulf the populace of Cybertron.

It was started by Megatronus' initial drives to overthrow the caste system, although this noble goal was corrupted by his jealousy of Orion Pax's ascension to Prime. Fighting between the two forces lasted for several million stellar cycles. By its end, however, Cybertron was a barren and uninhabitable wasteland, devoid of pure Energon, forcing Optimus Prime to enact the Great Exodus. Though the conflict left the dead Cybertron, it continued on other worlds, notably when Optimus and Megatron came to Earth, which turned out to be the staging ground for the next landmark event in the Cybertronian race's history.

"Many millions of years ago, a war raged between the forces of the heroic Autobots and the evil forces of the brutal Decepticons for control of the planet Cybertron. The Autobots battled valiantly in the name of honor—their courageous exploits bringing hope and glory to a beleaguered war-torn home planet, and inspiring countless generations of all Cybertronians yet to come on-line."
 * —History vid.

Known Participants

 * Autobots (Winners)
 * Decepticons
 * Neutrals

Known Battles

 * Battle of Technar
 * Battle of Tyger Pax