Revealing mistake: In the Orne bridge attack, a wounded British paratrooper rolls a grenade over the bridge wall to a walkway where some German soldiers are, the grenade landing in the middle of the walkway. The explosion of the grenade, however, comes from the bridge wall to the right, presumably where the pyrotechnics were placed for the grenade explosion.
Continuity mistake: On Omaha Beach, the engineers are able to use Bangalore Torpedoes to create large openings under a massive concrete barrier at the end of a sandy ravine. They then pack the holes with high explosives and after the dust clears, the barrier is about half as high as before, with two large sections remaining in the breach. In an immediately following scene, as troops advance through the breach, it is shown from the opposite side as a wide, flat opening, nothing like the view from the beach side.
Revealing mistake: In the very first scene, the tire tracks from the camera crew's vehicle are visible trailing behind as they follow the distance of the scene.
Factual error: Luftwaffe pilot Josef Priller is depicted wearing the rank insignia of an oberst (colonel); he was actually an oberstleutnant (lieutenant-colonel) on D-Day, although he was later promoted to oberst. His wingman, Heinz Wodarczyk, is depicted wearing the insignia of a feldwebel (flight sergeant); he was actually an unteroffizier (corporal).
Factual error: Group Captain Stagg is wearing several medal ribbons. In actual fact, Stagg was too young to have served in the First World War and had no military service before being commissioned into the RAF specifically to act as chief meteorologist for Operation Overlord. He would have had no ribbons at all until 1945, when he received the OBE, the US Legion of Merit and wartime service ribbons.