Heres my faves, including one not listed yet
The Thin Red Line
We were Soldiers once, and Young- - a true story of a unit that goes astray and into trouble in Vietnam, great book too!
Platoon- another Vietnam epic- very grisly at points.
A Bridge too Far - cast of dozens of top names in tale of bridge taking during Operation Market Garden WWII
Dirty Dozen- another great cast WWII epic
Private Ryan - an awkward story line, brilliantly played
Full Metal Jacket- it's Kubrik- you can't go wrong
U-571
Hunt for Red October- both with good story lines and blowing stuff up scenes
Borderline (questionable due to being a bit too dramatic and artsy)
Apocalypse Now- loved it but it's on the edge of believeability
Atonement- loved it, but is it really mostly about war or is it a love story that takes place during wartime?
Pearl Harbor- starring Ben Affleck as -who else- Ben Affleck- worst ever due to too much love story and not enough war:
1941 is a comedy
Nothing Terminator is about war per se just violence, I want history, I want stories based on the real deal, but that's just me