Jetfire grew tired of war a long time ago. The reckless ambition of the Decepticons, and the senseless violence of their war sickened him, and so he left Cybertron to go into hiding. The form he eventually chose on Earth seemed appropriate for one who wished to remain unseen. He slumbered in peace for years. Now, reawakened by the arrival of the war on Earth, he decided once again to enter the fight - this time on the side of the Autobots, and this time to end it for good, whatever the cost.