The only western in movie history in which the Indians occupy a fort and are held under siege, surrounded by the US Cavalry.
Some 25+ years later James Best and Denver Pyle would work together on the Dukes of Hazard.
At the 77-minute mark, the Wilhelm Scream is heard when a Navajo is shot and falls off the parapet. This is one of its earliest uses after its origin in the 1951 "Distant Drums."