After Nazi scientists bring dinosaurs back from the dead, Hitler's occupation of France is bolstered by the might of Tyrannosaurs and Triceratops. It's then up to the US forces to make dinosaurs extinct once again.
This is actually a trailer for the Half Life 2 mod Dino D-Day, but both the video and the mod present a bizarre, pulpy alternate history of the Normandy Landings. Although I sincerely doubt the troops would have had much success punching Nazi dinos in the face.
[via Discovery News]