Having previously fought in World War I, an unnamed sergeant (Lee Marvin) now leads soldiers of the U.S. First Infantry Division through World War II. His men include conflicted marksman Pvt. Griff (Mark Hamill), pulp novel writer Pvt. Zab (Robert Carradine), Sicilian Pvt. Vinci (Bobby Di Cicco) and medic Pvt. Johnson (Kelly Ward). The soldiers adapt to the hardships of war as they see conflict in North Africa and Sicily, take part in the D-Day landings, and liberate a Nazi concentration camp.