Das Boat (ge), Farewell to the king (us), Platoon (us), Apocalypse now redux (us), A l'est rien de nouveau (ge), The day after (us), Bravo Two Zero (uk), La 317 section (fr), Les croix de bois (fr), La legion saute sur Kolwezi (fr) and Blackhawk down (us)...of course!
A few of my favorites among those listed here are Rules Of Engagement, Top Gun, Gardens of Stone, The Last Castle (interesting as I used to live not that far away from the prison at Leavenworth), Saving Private Ryan, Band of Brothers, Full Metal Jacket (R. Lee Ermey is perfect in the role) and The Final Countdown. I also like the movies based on Tom Clancy's books.
Geez, there's an awful lot of people who don't seem to be reading the topic title before they answer.
As for me, that answer's easy, Cadence with Martin and Charlie Sheen. It's set in West Germany on an Army base in the early 1970s. Charlie plays a malcontent who winds up in the stockade with some very tough customers and suddenly realizes he's not the toughest guy but he is the only white guy there. He soon runs afowl of the Stockade's master sergeant played by his father, Martin. Charlie's battle with Martin draws him closer to his fellow prisoners and he finds a part of himself he didn't know existed and leaves the stockade a stronger, more thoughtful man.
I knew those people - I lived that life. That movie speaks to me perhaps more than any other of any kind because it is so personal for me.