Body - Transformers Armada Unicron with heavy modifications

Head - Powermaster Optimus Prime

Chest - Cut plastic

Truck parts - TRU Military Truck? I forget the name but it was a Carrier with some figures and out of scale tank, a jeep, and lots of signs and guns and barriers.

When Optimus Prime and the other Transformers are awaken in 1941 they must take on WWII vehicle forms. Prime transforms into a Dragon Wagon (my doesn't though) to fight the Cobra and the Decepticons.