Transformers: Megatron Origin (2007)

Before allegiance, rank and function-before war-a civilian will become a warrior, a warrior will become a leader. As a leader he will learn of the most powerful weapon on the planet-a weapon powerful enough to bind legions to his will-a faction named Decepticon. This landmark story brings the major players of the faction together for the first time in a seminal story for Megatron, the Decepticons, and The Great War.