Replying...
Intro. After an epic war against the Decepticons, the Autobots were outnumbered but were winning, when suddenly a meteor crashed in the middle of the battlefield. Everyone without exception fainted, some ran away and fainted in different parts of the vicinity, forests, caves and etc. When most woke up, ALL were human. Optimus prime, and the Autobots, joined the military humans, being the second line of defense, Optimus always took a few turns nearby.

Optimus Prime (Human Verdon)

@Arthur