Battle of Technahar

The Battle of Technahar occurred during the days of the Great War between the Autobots and the Decepticons on Cybertron.

"Masters and Students"
During the Battle of Technahar, Skyquake was ordered to assassinate Optimus Prime by Megatron. He was not successful. When Optimus Prime and Skyquake met years later on Earth, Skyquake mentioned their encounter in the battle and noted that the order for Optimus's head still stood.