Other mistake: During the scene of the attempted coup at the SS ministry, several officers are wearing heavy winter coats and gloves. The action takes place on July 20th.
Valkyrie (2008)
1 other mistake - chronological order
Directed by: Bryan Singer
Starring: Tom Cruise, Bill Nighy, Kenneth Branagh, Tom Wilkinson, Terence Stamp, Carice van Houten
Factual error: Somewhere in the middle of the film a close-up of a map of Europe is shown. Obviously, it is a map made after 1945. The borders of Rumania, Hungary and Slovakia show this.
Col. Claus von Stauffenberg: I am involved in high treason with all means available to me. Can I count you in?
Werner von Haeften: For anything, sir. Anything at all.
Col. Claus von Stauffenberg: "Anything" is a *very* dangerous word, Lieutenant.
More trivia for Valkyrie
Question: Why did all of the officers and high-ranking officials put out their cigarettes when Hitler's plane landed at the airfield?
Answer: They are supposed to stand at attention when he arrives and salute when he walks past them. It is considered bad form to salute the Führer (or any leader) with a cigarette in your mouth or hand.
Answer: Hitler was fanatically anti-tobacco: https://www.theatlantic.com/health/archive/2014/07/the-nazis-forgotten-anti-smoking-campaign/373766/.
Brian Katcher