Bugles in the Afternoon (1952)

Kern Shafter arrives at a Dakota army post to find it commanded by his old nemesis Edward Garnett. Shafter and Garnett despise each other, and the antagonism ripens in a competition for the affections of Josephine Russell, a beautiful young woman. Garnett repeatedly attempts to diminish Shafter in Josephine's eyes, and he sends Shafter on dangerous missions, clearly hoping Shafter will not return. A scouting mission in support of General Custer's command leads both Shafter and Garnett into the most dangerous circumstance of their lives.