Back in his glory days, Jetfire was a skilled Decepticon soldier. He was one of the best of the best. But he then learned that all the Decepticons really wanted was to control the universe so he joined the Autobots. He eventually became tired of the Autobot and Decepticon war, and fled to the planet Earth, where he would watch over the humans and study their progression for many, many years. Despite being old, Jetfire is still a formidable fighter, shown when he single-handedly destroys Mixmaster and kills Scorponok even after being mortally wounded.