This model first appeared during the brief period of Autobot-Decepticon harmony following the Quintesson departure from Cybertron 11 million years ago. With both groups free to pursue their own interests, the Autobots took up interpretive dance while the Decepticons practiced parade-drills and organized marching. Perhaps inevitably this got boring and the Decepticons decided to conquer the planet. These soldiers formed the bulk of that army.