Continuity mistake: In all of the aircraft scenes, almost every time they showed his aircraft, he has different types of weapons on it.
Continuity mistake: The film is supposed to take place in 1917, but several of the german soldiers our heroes encounter are armed with Bergman M18 sub-machineguns which didn't appear until a year later. To make things even worse all the guns comes with a magazine-type that didn't appear until the mid-thirties.
Continuity mistake: When Gunny Highway first introduces himself to his recon team, he walks into their barracks building. This building was at the end of a row of barracks. Minutes later, when Highway walks out the back end of this building, he actually comes out of a different building further up the street.