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.

William Holdenas Alvarez Kelly
Richard Widmarkas Col. Tom Rossiter
Janice Ruleas Liz Pickering
Patrick O'Nealas Maj. Albert Stedman
Victoria Shawas Charity Warwick
Roger C. Carmelas Capt. Angus Ferguson
Richard Rustas Sgt. Hatcher
Arthur Franzas Capt. Towers
Don 'Red' Barryas Lt. Farrow
Harry Carey Jr.as Cpl. Peterson