incorrect goof
The goofs section says that the color of most of the officers' shoulder straps, and sergeant's chevrons, etc. is light blue, the infantry color, instead of yellow, the cavalry color.
But I think that the soldiers in this movie are mostly infantry with just a few cavalrymen. The infantry might be mounted on horses or mules but would still be infantry.
I think this is yet another movie version of Red cloud's War and the Fetterman Massacre so infantry would be accurate in this case. The complete cast list includes Manuel Donde as Red cloud, so this film should be set in Wyoming instead of Oregon.
so somebody should check the plot to see if this is a goof or not.