Megatron's next plan was to create an entire army of Predacons to serve him. However, Darkmount was soon destroyed by an all-out attack by the Autobots. Shortly after the destruction of the base Megatron sent massive search parties to find the surviving Autobots and was even given a Predacon to look for them. Eventually fighting for the restoration of Cybertron and cyberforming of Earth, which was foiled by Optimus, but Megatron had his revenge and used the Nemesis to destroy the Autobot base before setting up the new fortress of Darkmount. After Unicron's defeat Megatron found himself both in a mission to retrieve the Iacon relic weapons as well as keep his troops in line from various in fighting among the ranks which resulted in a few casualties and several betrayals.

Megatron then however found himself teaming up with Team Prime, at that time, to counter the threat of Unicron, after Unicron rejected him. Megatron's first grand plan was to invade Earth with an army of undead Terrorcons but he himself was gravely wounded by the exploding space bridge, leaving Starscream in charge of the Decepticon army until he was revived by Bumblebee who he managed to possess for a brief time where he retook command. Now he and his long story rival, Optimus Prime, battle on planet Earth for the control of both Cybertron and Earth. When Megatron was rejected by the High Council, he waged war on Cybertron and left the planet wasted. But then Orion said it was not right to achieve justice with violence. When 'Megatron' proposed his plans for a just society, he believed it was necessary to overthrow Sentinel Zeta Prime with force. After leaving the gladiatorial arena for the political one, Megatronus saw fit to shorten his name. Megatron began talking with his old friend, Orion Pax, who saw him as a mentor. Megatronus was a gladiator in the pits of Kaon, who grew ambitious and saw corruption within the caste system and sought to put an end to it, with his own rule. During the Golden Age on Cybertron, Megatron was originally a mining bot designated D-16 before naming himself Megatronus, after the Prime of the same name. He was the leader of all the Decepticons during the Great War on Cybertron. Megatron is the primary antagonist of Transformers Prime, as well as one of the main characters in War for Cybertron and Fall of Cybertron. 'Let that be a warning to anyone who dares cross a gladiator of Kaon-be they Decepticon.or Autobot!'

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