Here are a few ideas: Hound is a member of the older generation of Transformers. He fought alongside Optimus Prime during the early years of the Cybertron war, before joining an elite combat team called The Wreckers, led by an Autobot General known as Magnus. He was sent to Earth on a reconnaissance mission. His job was to track a squad of Decepticon spies and report their movements back to Magnus, who was en route to Earth with the rest of the Wreckers to deal with the growing off-world threat. The Decepticons were attempting to influence the outcome of World War Two for their own evil purposes. Soon after arriving on Earth, Hound mysteriously lost communication with his team, but decided to continue his mission regardless. He tracked a group of Decepticons to a US Army base, where he took the form of a military Jeep to observe them undercover. It wasn’t long before he was discovered...by a human soldier named Sergeant James Wilde. After convincing Sgt. Wilde that he wasn’t a Nazi war robot, the two stuck up a unique, and secret, friendship that lasted for many years. During this time, Hound joined his human companion on many missions and developed an unprecedented appreciation for Earth culture. It was during one of these missions when tragedy struck, and Sgt. Wilde was killed in action. Hound was distraught, having lost his only friend and companion. He recovered the sergeant’s dogtags and hung them from his vehicle mode’s mirror. He continued his mission alone, until one day a fight with a Decepticon soldier left him mortally wounded. To save his own life he went into self-imposed stasis lock and reverted to his vehicle mode. His current whereabouts are unknown.