The Colossus droid represents a specific class of droid. These droids were engineered on Iokath subsequent to the demise of the species responsible for the world's creation, an event that followed the Iokath Civil War. ARIES, the sole surviving self-aware droid on Iokath, repurposed other droids as subservient entities, transforming them into armed combatants irrespective of their initial function. The Colossus droid emerged as a colossal war construct, possessing a height measured in dozens of meters, and with the destructive capability to obliterate an entire military force.