In the years following his original battle on Earth, Prime would defeat Megatron twice more, gain the power of the Matrix of Leadership, a powerful Cybertronian artifact with the power to bring transformers back to life.
Prime and the Autobots continued their fight against the Decepticons in order to protect the Earth from the ensuing threat of the Decepticons return.
After defeating Megatron and the Decepticons on Earth, Prime and his team joined forces with the humans, forming an alliance known as N.E.S.T., a group commited to hunting down the remaining Decepticons who are in hiding on Earth. In pursuit, the few remaining Autobots, lead by Prime, chased after Megatron and tracked him down on the planet Earth. After countless years of combat, the Autobots eventually were all but defeated, and with Cybertron's detereorating condition, Megatron fled the planet in search of the All-Spark. Cybertron was engulfed in the flames of a civil war between the peaceful Autobots, lead by Sentinel Prime (Optimus Prime's mentor), and the tyrannical Decepticons, led by Megatron.
Optimus Prime is the commander of an advanced race of mechanical beings from the planet Cybertron, known as transformers who have the power to 'transform' into vehicles for disguise, transportation, and combat.
