The Cybertronian Empire, as it became known to some, came back into contact with their kinsman when Autobots led by Grimlock discovered one of these planets. The Autobot raids soon escalated into full-scale war, and Jhiaxus personally became obsessed with eliminating what he considered to be genetically inferior stock. When the newly-rebuilt Megatron challenged him, he reacted by blasting Megatron into atmospheric re-entry. Far from killing him, this only convinced Megatron to join forces with the Autobots against Jhiaxus's troops, whom he refered to as "Cybertronians" rather than "Decepticons". Following Optimus to Earth, Jhiaxus ordered an all-out genocidal attack on the combined Autobot-Decepticon army. Instead, he saw his troops get slaughtered by an enemy he had previously considered harmless. Furious, he retaliated by vaporizing San Francisco. Horrified, Prime tried to negotiate a stop to the hostilities, but Jhiaxus went mad and refused to see reason. Before he could kill Prime, however, the Swarm arrived and injested his body.