Early production charts had Vincent Price in the role of "Murdo Carvell," but he was replaced by Frank Fenton when the role was severely cut. Many of the uncredited cast had more lines and screen time than Fenton, who was credited on screen.
Much of Cody's life as depicted in the film was true: He did fight to the death with Chief Yellow Hand and he did receive the Congressional Medal of Honor (although it was rescinded in 1917 because he was not in the army); his son, Kit Carson Cody, did die (but of scarlet fever, not diphtheria); his wife (not the daughter of a senator) had three other children.
This is the second film that features the character of Buffalo Bill and Anthony Quinn playing a Cheyenne warrior. The first one was The Plainsman.
When Sgt. Chips is delivering mail at the beginning of the film, one of the mailboxes he delivers to is labeled "2nd Lt. A. MacKenzie". Æneas MacKenzie was one of the film's writers.