Transformers - The Ark

Optimus Prime led a team of Autobots in a ship called the Ark to destroy the asteroid field. They used their weapons and firepower and blew the asteroid to smithereens. However, once the asteroids were destroyed the Decepticons ambushed the Autobots and they weren't ready for it. The Decepticons and the Autobots had a fierce and violent battle. Although the Autobots were not ready, they still fought hard, but they were still too weak. Sensing defeat Optimus Prime made a suicide run to kill the Decepticons.