Factual error: Col Vandervoort, 2nd Batt 505 PIR 82nd Airborne Div, is shown with a 'cricket,' "1 click to be answered by 2 clicks." The code is correct but the 'cricket was only issued to members of the 101 Division. This was at the insistence of General Maxwell D.Taylor after his experiences in the airborne assault on Sicily. It should also be noted that the cricket was not shaped like a frog but was made mainly from brass by the Birmingham based THE ACME company, founded by the maker of the original London Police Force's whistle manufacturer, and they did a special run of over 7500 for the order. This makes telling original D-Day crickets from fakes easier due to die marks and press marks.
Factual error: In one scene, a German Mauser bolt-action rifle makes an exaggerated click-click sound when a bullet is chambered. (A U.S. paratrooper mistakes this click-click sound from his enemy's Mauser rifle with the click-click sound from the American signaling device, which was used when challenged by other U.S. paratroopers.) However, a Mauser rifle does not make such a loud sound when chambered. No decent soldier would allow his rifle to make such a loud click-click sound anyway.
Factual error: The Gliders are shown being towed by Lancaster Bombers (oval twin tail) when they were actually towed by Stirlings (single tail).
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.