Sergeants 3

Mike, Chip, and Larry are three lusty, brawling U. S. Cavalry sergeants stationed in Indian Territory in 1870. Mike and Chip are determined to prevent Larry from carrying out his decision to leave the Army at the end of his current hitch and marry beautiful Amelia Parent. One night the three cronies befriend a trumpet-playing former slave, Jonah Williams, who dreams of someday becoming a trooper... (imdb)