Talvisota (1989)
http://www.imdb.com/title/tt0098437/
A masterful Finnish film about a unit as it was ground down by the Winter War in 39/40. It's notable for a very deadpan, graphic, and matter-of-fact style. It also follows a very strict adherence to realism. There is a lack of any big chested Hollywood heroism in the film, just as in real life. It's from this film and similar European classics that the first scenes from "Saving Private Ryan" are drawn. But this film is much, much better than that one.
Rukajärven tie (1998)
http://www.imdb.com/title/tt0162625/
A more recent Finnish film about the Continuation War. It follows a squad of their famous bicycle infantry as it probes around the Karelian countryside trying to figure out where the Rooskies are. A little more romantic and traditional than Talivsota, it's still a great film.
Taegukgi hwinalrimyeo (2004)
http://www.imdb.com/title/tt0386064/
This is the great Korean War epic that's about the most famous film out of S. Korea this decade. It's typical of Korean films in that it includes a good deal of what we would consider melodramatic acting. But it couples this with excellent and HIGHLY energetic combat scenes the likes of which you could never do in Hollywood anymore owing to the insurance problems. Casts of thousands stab at each other and fire rifle blanks into each other. I'm quite sure the real med clinics were kept busy through the whole shooting. There's lots of Garand vs. Mosin goodness. And you have to remember, the Koreans and Chinese fought the battles with enormous emotional intensity. They really would charge, screaming, at each other.
Zulu (1964)
http://www.imdb.com/title/tt0058777/
Probably the greatest war movie ever made. It follows the real events of the battle of Rorke's Drift, where few fought against many. The action is realistic but not bloody. They could not get away with showing what one of those Martini slugs did to a man back in the mid 60's. But that's a small point. The acting is excellent and script nearly perfect. It's everything "Black Hawk Down" failed to be--focused, tight and well directed.
The Thin Red Line (1998)
http://www.imdb.com/title/tt0120863/
I know, everybody hates this film. But it does have some strikingly realistic battle scenes and holds its own as a war movie. It also features some rather deeper waters about the nature of life and death, which I suppose irritates people who want a straight-up combat picture.
all time favorite is "They Were Expendable
EXCELLENT choice! This is an often-overlooked John Ford war movie. It's unusual among wartime productions in its rather somber and understated tone. There's no chest thumping in it, and it has a pretty bleak ending.
Second Milus' "Rough Riders"
I've always had a soft spot for "Ice Station Zebra"
"Tears of the Sun" is only marginally less bad than Michael Bay's "Pearl Harbor." The cast and directors of both should be taken out and shot.
I always wondered if they saw an alternative ending because the one I saw had the American 6 rangers and troopers were pretty much defeated soundly and massacred to last man except for two or three guys.
The problem is, the director falls back into the tried-and-true Sillywood standards. You may not notice if you haven't seen many war movies, but the Germans inevitably act like complete idiots and charge into the American guns to get slaughtered. At the same time, the Americans are amazingly resistant to German bullets. In SPR, the Germans in the final fight act like idiots. Instead of using their tanks to blast the American positions apart from the junction (well within their range) they barge down the street like idiots even after it becomes clear there's an ambush waiting for them. And suddenly Tom Sizemore can take a few 8x57JS rounds in the back and complain about getting the wind knocked out of him. Have you seen what those do to STEEL PLATES? His chest would have been opened up like a spam can, esp. at that range. It's a load of dren.