The Big Red One (1980)
My favourite Sam Fuller film and war movie - this film is just amazing. Rather than a strong plot this film is a series of incidents surrounding 4 riflemen and their NCO as they cross the globe as part of The 1st Infantry Division (The Big Red One). Lee Marvin just steals it (as always in the leading role) and Robert Caradine is great too.
The film was butchered by the studio when it came out but is now available in a reconstructed version - so make sure you see that one.