G.I. Joe: Sgt. Savage and His Screaming Eagles: Old Soldiers Never Die

In 1944, Master Sergeant Robert Steven Savage lead a squad of men into Berlin. He was betrayed by one of his fellow soldiers, Krieger, a double-agent for the Axis Powers. Krieger had Savage's entire squad killed and used Savage-himself as a guinea pig for various genetic experiments. (imdb)