Factual errors: When Seargent York looks at the calendar at the end of September to write down his most recent earnings, it is obvious from the calendar close-up that the addition from Sept. 22nd to Sept. 23rd is incorrect. The addition of $41.35 plus $2.55 should yield $43.90, however, the incorrect total of $43.80 is recorded on the calendar as the total for Sept. 23rd.
Crew or equipment visible: A guide wire is visible that is connected to a tree stump in the scene where the stump is being removed by a horse. The guide wire is visible behind the stump as the stump pulls free from the ground.
Factual errors: In the movie Sergeant York is presented the French 'Medaille militaire' by Marechal Foch and is shown already wearing the 'Croix de Guerre', however York was not awarded the 'Medaille militaire' by France. He did receive, though, the 'Legion d'honneur' and the 'Croix de Guerre'.
Revealing mistakes: At 6.10am York and company leave the trenches to attack the German positions. Their shadows however indicate the sun is directly overhead.
Factual errors: Alvin York actually carried the British Enfield rifle into battle instead of the US 1903 Springfield as shown.
Factual errors: Sgt. York is shown with his pistol shooting a line of German soldiers coming at him from front to back. In reality he shot them in a line from back to front as he quoted himself, "just like a flock of turkeys".