Other mistake: The opening scene shows a soldier lighting his cigarette from a lantern. Not only does the cigarette not touch the flame, no smoke is seen as the soldier puffs on it.
A Very Long Engagement (2004)
1 other mistake - chronological order
Directed by: Jean-Pierre Jeunet
Starring: Jodie Foster, Audrey Tautou, Gaspard Ulliel, Dominique Pinon, Chantal Neuwirth
Factual error: In the beginning of the movie they state that it is January 1917, a short while later during the assault a Renault FT tank is shown taking part in the attack. The Renault FT tank did not see combat for the first time until the end of May 1918, over a year later.