Maybe Son of the Morning Star
or Little Big Man
or They Died WIih Their Boots On
Y'know, what're the odds, Custer dying in the last battle he fought?
I've seen all three of these, plus most of the other movies made about the subject, but the only film I can remember where they played "Garry Owens," which would be the theme for the 7th Calvary theme, would be "They Died with Their Boots On." The only problem with that, is I remember it being in black-and-white.