Gary Cooper as Maj. Alex 'Lex' Kearney

Phyllis Thaxter as Erin Kearney

David Brian as Austin McCool

Paul Kelly as Lt. Col John Hudson

Philip Carey as Capt. Edward Tennick

Lon Chaney Jr. as Pete Elm

James Millican as Matthew Quint

Guinn 'Big Boy' Williams as Sgt. Snow

Alan Hale Jr. as Mizzell

Martin Milner as Pvt. Olie Larsen

Wilton Graff as Col. George Sharpe

George Eldredge as Judge Advocate (uncredited)

Fess Parker as Jim Randolph (uncredited)

Ewing Mitchell as Capt. Spencer (uncredited)

Richard Hale as Gen. Halleck (uncredited)

James Brown as Pvt. Ferguson (uncredited)

Michael Chapin as Jamie Kearney (uncredited)

Ben Corbett as Sergeant Major (uncredited)

Vince Barnett as Cook (uncredited)

William Fawcett as Cpl. Ramsey (uncredited)

Edward Hearn as Calhoun (uncredited)

Art Felix as Indian (uncredited)

Mike Ragan as Red (uncredited)

Nedrick Young as Sgt. Poole (uncredited)

Jack Woody as Sims (uncredited)

Tony Urchel as Indian (uncredited)

Artie Ortego as Spectator at Ceremony (uncredited)

Ric Roman as Guard (uncredited)

Poodles Hanneford as Cpl. Hamel (uncredited)

George Sowards as Trooper (uncredited)

Jack Tornek as Trooper (uncredited)

William Steele as Trooper (uncredited)

Philo McCullough as Barfly (uncredited)

Ralph Sanford as Barfly (uncredited)

Rory Mallinson as Barfly (uncredited)

Fred Kelsey as Barfly (uncredited)

Stuart Hall as Judge (uncredited)

Dick Gordon as Man in Corridor (uncredited)

George Bell as Trooper (uncredited)

Ray Bennett as Commissioner (uncredited)

Jerry Brown as Trooper (uncredited)

Kit Guard as Barfly (uncredited)

Richard Lightner as Lt. Johnson (uncredited)

Jack Mower as Guard (uncredited)

Jerry O'Sullivan as Lt. Evans (uncredited)

Betty Jean Onge as Girl (uncredited)

George Ross as Riley (uncredited)