Man, you guys are serious about your war movies! I dunno, I think a "war" flick doesn't necessarily have to be about the war itself but can be set with a war as the backdrop. With that in mind, in no particular order:

1) Band of Brothers (mini-series yes, but still the best war movie ever made, IMO)
2) Saving Private Ryan
3) Shindler's List
4) The Dirty Dozen
5) Midway
6) Kelly's Heros
7) Mash
8) Platoon (I can't believe this hasn't been mentioned yet)
9) Das Boot
10) Glory

Honorable mention to Apocalypse Now, Force 10 From Navarone, Good Morning Vietnam, & Memphis Belle.