Help! Anthony Quinn's Role

Yes.

I have read that originally Buffalo Bill was supposed to have had a bigger role in The Plainsman (1936) and the movie would have ended with him killing Yellow Hand at Hat Creek or Warbonnet Gorge. So perhaps someone worked on both movies.

In The Plainsman (1936) Wild Bill is shot as a cavalry column under General Merritt is passing through Deadwood en route to reinforce General Crook's command. General Merritt, Colonel of the Fifth Cavalry, was much younger than the actor in the movie despite having been a Civil War General, and did pass though Deadwood in 1876, but only after having joined Crook's command.

In Buffalo Bill the Fifth Cavalry under the command of the fictional General Blazier (first name Trail?)is marching to reinforce General Crook after the Little Brig Horn when it fights the Battle of War Bonnet Gorge.

In The Command a force of cavalry and infantry and a civilian wagon train (rather as in General Sully's Sioux campaign in 1864) is marching to join another force. It sounded like their destination was General Cook, but in the original James Warner Bellah story they were marching to reinforce General Crook after the Little Big Horn.

In Last of the Comanches , set late in 1876, one of the characters mentions how they defeated the Sioux after Custer's Last Stand, possibly meaning those specific soldiers were there. In one scene a hat is seen with the insignia "14 G". So they would have been members of Troop G of the Fourteenth Cavalry (which was not created until decades later).

So I can't help wishing that someone had made a movie showing what fictionally would have happened after all those (mostly fictional) reinforcements reached General Crook, and showed the defeat of the Sioux in a battle at least as spectacular and exaggerated as the Battle of War Bonnet Gorge in Buffalo Bill !