Optimus Prime is a character in the Transformers universe. After his ship crashed on Earth, he remained unconscious for millions of years, then an earthquake on Tuesday, May 8, 1984, awoke the ship's repair system, which then repaired him and adapted him to have the ability to transform to an Earth vehicle. He is the leader of the Autobots, a faction of heroic Transformers from the planet Cybertron who wage their battles against the evil forces of the Decepticons.