Factual error: The worst historical distortions in this film must concern legendary "Wild Bill" Hickock. First of all he wasn't killed by a teenage boy, but one John McCall, a man in his 30's. McCall sneaked behind Hickock who was in the middle of a poker game and shot him through the head killing him instantly. Secondly this took place on August 2 1876, about five weeks AFTER the Custer's Last Stand. (Time)

Revealing: During the Little Bighorn massacre one of Custer's lieutenants turns to address Custer and is struck in the back with an arrow, and the thick pad or board is visible under the actor's shirt.