Leslie Goodwins Director Robert Preston Donald `'Don'` Morse Actor Nancy Kelly Kit Richards Actor Edmond O'Brien William Mayberry `'Bill'` Burke Actor Harry Carey MSgt. Bill `'Thunderhead'` Richards Actor Buddy Ebsen Jeff Hollis Actor Paul Kelly Sgt. Tex McBride Actor Richard Cromwell Spence Actor Robert Barrat Col. Burke Actor Erville Alderson Pa Hollis Actor Edward Fielding Chief of Infantry Actor Selmer Jackson Thomas Morse Actor Grant Withers Captain Actor Walter Sande Medical Officer Actor Kathryn Sheldon Ma Hollis Actor Gayne Whitman Staff officer at ceremony Actor Douglas Evans Radio Announcer Actor Eddie Dunn Burke's recruiting officer Actor Jack Briggs Private Actor Lee Bonnell Private Actor Robert Smith Private Actor John Twist Screenwriter Hugh Fite Screenwriter Howard Benedict Producer J. Roy Hunt Cinematographer Theron Warth Film Editing Van Nest Polglase Art Director