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William Holden stars as Alvarez Kelly in this Civil War actioner. While transporting 5,000 head of cattle to the Union forces, Holden is captured by Confederate officer Richard Widmark. Threatened with instant execution if he doesn't cooperate, Holden sets about the train the raw rebel troops to become cattle drovers in order to transport the herd below the Mason-Dixon line. Widmark turns out to be the least of Holden's problems when he tries to negotiate the cattle through Indian territory.