[cripplecreek]

I gotta go with "Band of Brothers" (WWII) and suprisingly "The lost Battalion" (WWI)

[Madison Moose]

Those are two of my favorites as well. The Lost Battalion didn't have the greatest quality of production, but it was entertaining.

Other than those two my favorites include, in no particular order:
The Great Raid(2005)WWII Pacific
A Bridge Too Far(1977)WWII Europe
The Green Beret's(1968)Vietnam
Full Metal Jacket(1987)Vietnam
&Stalingrad(198?)WWII Russian Front