Revealing mistake: The group ambushes a German patrol with a half track and a tank. After the fight is over Dolph sits on the ground leaning to the tracks of the tank. The Lieutenant comes back alone holding his Thompson submachine gun. You can see that the barrel is plugged with an aluminum insert to enable the operation of blank cartridges. (01:00:00)
Revealing mistake: In one of the opening scenes the platoon of the captain is gunned down by a MG42. You can see the crimped fronts of the blanks in the belt.