The Great Escape with Steve McQueen was another good one and one of my favories was "BattleGround" also Bridge over the River Kwai and Stalag 17 and ofcourse who could forget "The Green Berets"
We Were Soldiers, Saving Private Ryan and Enemy At The Gates are the first 3 that come to mind.
We Were Soldiers is about 2 1/2 hours long, but I remember being pissed when it was over because I could have watched about 5 hours of that movie.
Heartbreak ridge
and the first half of Full Metal Jacket!
No love for "The Dirty Dozen"? It is a great movie.