Revealing mistake: At the cave near the end, there are several scenes with the secretary of the interior. These scenes with the main actors appear to be filmed in front of the background as they cast shadows on the other film and the lighting is different. This was most likely done because of budget limitations.
Cheyenne Autumn (1964)
1 revealing mistake
Directed by: John Ford
Starring: Richard Widmark, Karl Malden, Carroll Baker, Sal Mineo
Factual error: The movie takes place in 1878. The Indians are all armed with Winchester repeating rifles. Indians of the period were more likely to be armed with old obsolete rifles (Civil War vintage) including some muzzle loaders with prehaps a sprinkling of Winchesters. Also, Indians were very proud of their rifles and usually decorated them with items such as brass tacks; no such decorations are to be seen.
Wyatt Earp: Say, you're the doctor around here. How come I always have to perform all the complicated operations?
Doc Holliday: You know I am a dentist, not a doctor. Wait until somebody shoot him in the teeth.