Some of my Fav's:
Saving Private Ryan, Enemy at the Gates, Glory, Tora, Tora, Tora...,Gettysburg, Platoon, U-571, Apocalypse Now (Yes I know its debatebale whether its a War Movie). Also other movies with War scenes of mention: Cold Mountain, The Good, Bad and the Ugly, and Last of the Mohicans...
But my Favorite is...
Full Metal Jacket...."I'm Gunnery Sargeant Hartman....