Blood Brothers
Blutsbrüder (original)
In 1864, American soldiers massacre a Cheyenne village at Sand Creek. Disgusted by the massacre, Harmonika, one of the soldiers, deserts the army and is captured by the Indians. At first, the Cheyenne hold him responsible for the murder of the wife and the son of their chief Grauer Esel, but soon Harmonika obtains the tribe′s confidence.
Starring Dean Reed, Gojko Mitić, Gisela Freudenberg, Jörg Panknin, Cornel Ispas, Toma Dimitriu, Iurie Darie, Alexandru Manea, Sina Fiedler-Engel, Fred Ludwig
Watch "Blood Brothers" on Kanopy released in 1975. It's a drama and western movie, and has a rating of 5.3 out of 10 from Imdb which is fairly okay for this kind of movie.