In 1864, during the American Civil War, Mexican cattleman Alvarez Kelly supplies the Union with cattle until unexpected circumstances force him to change his customers.
| Writing | Franklin Coen | Writer |
| Directing | Edward Dmytryk | Director |
| Production | Sol C. Siegel | Producer |
| Art | Walter M. Simonds | Art Direction |
| Editing | Harold F. Kress | Editor |
| Production | Lee Lukather | Unit Production Manager |
| Costume & Make-Up | Virginia Jones | Hairstylist |
| Sound | Johnny Green | Original Music Composer |
| Art | Morris Hoffman | Set Decoration |
| Sound | Lambert E. Day | Sound |
| Camera | Joseph MacDonald | Director of Photography |
| Production | Ray David | Producer |
| Writing | Daniel Taradash | Writer |
| Writing | Elliott Arnold | Writer |
| Camera | James Saper | Assistant Camera |
| Crew | Hal Needham | Stunts |
| Crew | Buddy Van Horn | Stunts |
