Song of the West (1930)

As a wagon train treks west, two men, Lt. Singleton and a Stanton, a scout, are rivals for the attentions of the Colonels's daughter, Virginia. Stanton is held for murder after a fight with a bad guy named Davolo. He escapes jail and joins the train disguised as a minister. Virginia runs off with him and they start a saloon in San Fransisco. Guilt overcomes him and he leaves her, he rejoins the Army, afterward finding she forgives him.