John Wayne as Colonel Mike Kirby

David Janssen as George Beckworth

Jim Hutton as Sgt. Petersen

Aldo Ray as Sgt. Muldoon

Raymond St. Jacques as Sgt. Doc McGee

Bruce Cabot as Colonel Morgan

Jack Soo as Colonel Cai

George Takei as Captain Nim

Patrick Wayne as Lt. Jamison

Luke Askew as Sgt. Provo

Irene Tsu as Lin

Edward Faulkner as Capt. MacDaniel

Jason Evers as Capt. Coleman

Mike Henry as Sgt. Kowalski

Craig Jue as Hamchunk

Chuck Roberson as Sgt. Griffin

Eddy Donno as Sgt. Watson

Rudy Robbins as Sgt. Parks

Richard 'Cactus' Pryor as Collier

Walter Soo Hoo as Viet Cong Soldier (uncredited)

Paul Genge as Gen. Thomas (uncredited)

Cliff Lyons as Hugh Parkinson (uncredited)

Walker Edmiston as Lt. Moore (uncredited)

Kenner G. Kemp as Nightclub Patron (uncredited)

Ernie F. Orsatti as Sgt. Don Ross (uncredited)