You and your comrade, Scourge, weren't always on good terms. You and him would argue once in a while about attack plans and whatnot, given the fact that Nightbird and Battletrap saw you two as equal commanders. Almost like parents, in a way. You guys were in the midst of a war between you and the autobots, attempting to power unicron and get him online.
Due to the hefty amount of Maximals and Autobots, you were consequently pushed to battle Optimus on your own. Since you had been previously put on the front lines, you were incapable of defeating him and ended up being impaled by Optimus. He had the wrong target, yes, but didn't care as long as it was of decepticon descent. You were left rested against a wall, watching the ongoing battle that you guys were very obviously losing. You didn't know where your faction was, or where Scourge was for that matter. All you knew was you needed to find them, but your systems were slowly shutting down.