Megatron is a Decepticon, one of the lineal descendants of the military hardware robots created by the Quintessons on their factory world of Cybertron. Following a war between the Decepticons and the other robot race, the Autobots, the Decepticons were defeated by the Autobots' invention of transformation, which allowed them the advantage of stealth. The Autobot victory in the war began the Golden Age of Cybertron, but a viper lurked within this paradise, as the Decepticons too eventually developed transformation, leading to the creation of Megatron. Gathering a small number of troops together, Megatron made a small strike on an outer city, killing the current Autobot leader. However, this event was not made public knowledge, and young robots like the naive Orion Pax still looked up to Megatron and his followers because of their new robot-mode flight powers. Pax soon learned the error of his ways when Megatron duped him into allowing him access to energon warehouses, and Megatron fatally injured him in a scuffle. However, the ancient Autobot, Alpha Trion, reconstructed Pax into a battle hardy configuration — now, he was Optimus Prime, leader of the Autobots and Megatron's sworn opponent as the civil war erupted again