12 American military prisoners in World War II are ordered to infiltrate a well-guarded enemy château and kill the Nazi officers vacationing there. The soldiers, most of whom are facing death sentences for a variety of violent crimes, agree to the mission and the possible commuting of their sentences.

Lee Marvinas Maj. John Reisman
Ernest Borgnineas Maj. Gen. Worden
Charles Bronsonas Joseph Wladislaw
Jim Brownas Robert Jefferson
John Cassavetesas Victor Franko
Richard Jaeckelas Sergeant Bowren
George Kennedyas Major Max Armbruster
Trini Lópezas Pedro Jiminez
Ralph Meekeras Captain Stuart Kinder
Robert Ryanas Col. Everett Dasher Breed