Great War

The Great War (グレートウォー, Gurēto Wō) was the first and most violent outburst of fighting on the planet Cybertron, between the newly christened Autobots and Decepticons. It was started by Megatronus initial drive to overthrow the caste system, although this noble goal was corrupted by his jealousy of Optimus' ascension to Prime. This set the spark in the war for the AllSpark and the Golden Age became history over time.

Fighting between the two forces lasted for several million stellar cycles, it also spread and continued on other worlds, not even the Neutral avoided the war despite their neutrality. By near end of its initial battles on Cybertron, however, Cybertron was a dead, barren, lifeless, and uninhabitable wasteland, completely devoid of pure Energon, forcing the two factions to enact the Great Exodus, a mass evacuation of all Cybertronians to leave their dying world and find other worlds to seek refuge.

After the Wars on Cybertron, even though the conflict left the dead Cybertron, its battles between the Autobots and Decepticons notably continued, when Optimus Prime 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, war raged between the forces of the heroic Autobots and 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 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