Other mistake: In the final battle scene, before a shot is fired, the Germans are seen marching along with many Panzerfausts over their shoulders, and yet they are seen unpacking them much later. A few well aimed shots at a disabled tank would have finished the battle very effectively much sooner. Panzerfausts were a very effective anti tank weapon.
Other mistake: Just before the final battle, while ammo checks are being done a shot is fired from Norman's machine gun when when the camera is aimed at the road. No sound accompanies the shot and at that stage of the battle they were supposed to be quiet, not taking test shots.
Add timeChux Edward