Continuity mistake: Near the beginning, Lt. Col. Daniel Kiley is in a scout plane and flies over Col. Martin Hessler, who is in a German staff car below. Kiley tells the pilot to "rev the engine" just above the car to entice Hessler to look up at them, so he can get a good photograph of his face. The plan works, and the ground level movie camera shows Hessler looking up. When the "photo from the air" is later developed, it shows Hessler looking up from the ground level camera's perspective, eyes focused about 30 degrees behind the airplane and giving a profile of Hessler.
Continuity mistake: When the German saboteurs dressed in American MP uniforms jump out of their plane, all the parachutes are black, except two that are white. When the scene cuts to those soldiers on the ground gathering their parachutes to hide them, they are ALL white.
Continuity mistake: Before the massacre scene, a German truck is reversing with a German soldier walking with it on the left side of the screen. When Lieutenant Weaver looks to his right, the same truck is backing up, and the same German soldier is now on the right side of the screen. The film was obviously flipped.
Continuity mistake: In the initial German panzer attack against the Americans, a German tank 104's left side track and road wheels are damaged by a bazooka shell, resulting in a missing front road wheel and a loose/sagging track. However, when the tank turns off the road and goes down the slope, the left track is taut and the missing road wheel has magically appeared.