Sitting Bull (1954)
Sitting Bull is a 1954 Western film directed by Sidney Salkow and René Cardona that was filmed in Mexico in CinemaScope. In a greatly fictionalised form, it depicts the war between Sitting Bull and the American forces, leading up to the Battle of the Little Bighorn and Custer's Last Stand. It was the first independent production to be filmed in the CinemaScope process. Featuring sympathetic portrayals of Sitting Bull and Crazy Horse, The New York Times called it a "crazy horse opera".
More at Wikipedia.