John Wayne as Sgt. John M. Stryker

John Agar as PFC Peter T. 'Pete' Conway

Adele Mara as Allison Bromley

Forrest Tucker as PFC Al J. Thomas

Wally Cassell as PFC Benny A. Regazzi

James Brown as PFC Charlie Bass

Richard Webb as PFC Dan 'Handsome' Shipley

Arthur Franz as Cpl. Robert C. Dunne / Narrator

Julie Bishop as Mary

James Holden as PFC 'Farmer' Soames

Peter Coe as PFC George Hellenpolis

Richard Jaeckel as PFC Frank Flynn

William Murphy as PFC Eddie Flynn

George Tyne as PFC Hart S. Harris

Hal Baylor as Pvt. J.E. 'Ski' Choynski

John McGuire as Capt. Joyce

Martin Milner as Pvt. Mike McHugh

Leonard Gumley as Pvt. Sid Stein

William Self as Pvt. L.D. Fowler Jr.

David M. Shoup as Colonel D.M. Shoup

H.P. Crowe as Lt. Col. H.P. Crowe

Harold G. Schrier as Captain Harold G. Schrier

Rene A. Gagnon as PFC Rene A. Gagnon

Ira H. Hayes as PFC Ira H. Hayes

John H. Bradley as PM3C John H. Bradley

Conrad Binyon as Marine (uncredited)

David Clarke as Wounded Marine (uncredited)

Fred A. Datig as Marine (uncredited)

Bruce Edwards as Marine (uncredited)

Dorothy Ford as Tall Girl (uncredited)

Carole Gallagher as USO Woman (uncredited)

Fred Graham as Officer (uncredited)

Don Haggerty as Colonel in Staff Car (uncredited)

Gil Herman as Lt. Baker (uncredited)

William Hudson as Marine (uncredited)

I. Stanford Jolley as Forrestal (uncredited)

Dickie Jones as Scared Marine (uncredited)

Billy Lechner as Marine (uncredited)

Mickey McCardle as Marine (uncredited)

Roger McGee as Sailor (uncredited)

Al Murphy as Bartender (uncredited)

Frank O'Connor as Waiter in Bar (uncredited)

Judy Sochor as USO Woman (uncredited)

Glen Vernon as Marine (uncredited)

Steve Wayne as Marine (uncredited)

Dick Wessel as Grenade Instructor (uncredited)

Ted White as Marine (uncredited)

John Whitney as Lt. Thompson (uncredited)

Joy Windsor as USO Woman (uncredited)