Factual error: After Hardy dies and they're going through his possessions, a football scarf is pulled from his kit bag. The scarf has a Sunderland AFC badge. The film is set in World War II. The badge on the scarf was introduced in the 1970s.
Factual error: Prochnow is addressed as "Major," in English, but he wears the collar tabs of an SS lieutenant colonel. He should've been addressed as "Obersturmbannfuhrer," or, in English, as "Colonel," because lieutenant colonels are acceptably addressed as "Colonel," as are full colonels.
Factual error: In the interrogation scene with Carravaggio, the SS officer (incorrectly addressed as the Wehrmacht equivalent "Herr Major") does not have the correct collar insignias. For a Sturmbannführer they should have four small squares on the black background.
Factual error: The bird calls used in the film, such as the Cactus Wren, are from the USA, not Tunisia and Italy where the film is set.
Factual error: In the interrogation scene with Carravaggio, the German officer is addressed by the private Wehrmacht soldier as "Herr major". The officer is SS. By his shoulder patches he indeed has the equivalent rank of a major, but the correct SS rank is "Sturmbannführer". SS officers were never addressed as "Herr", but simply with the rank.
Factual error: Radial tires - bulging - and jeep-like tread in 1914 on the pickup aren't right. Most of 1914 tires were bias ply and very narrow, like 6 inches wide.