Factual error: It is true that Von Richthofen was killed during an aerial battle with a Canadian pilot; but it was not by the pilot (in the movie, his counterpart Brown) himself, but by either one of his comrades, or a British flak gun from the ground (it is still not for sure which one did it, though).

Revealing: When Von Richthofen is shot down and crash-lands in the combat zone, German and British soldiers arrive and fight for possession of the Red Baron's plane. It is strange, though, that the German soldiers fire British Lee Enfield rifles instead of the German Mauser Gewehr 98.