A few from the other side:
Das Boot: Brilliant German 1980's film about a german U-Boat in the North Atlantic. Suspenseful doesn't even begin to describe it. Based on the book of the same name (which incidently I only read a fortnight ago) this was originally a 6 hour miniseries which was cut down for theatrical release. I've yet to check out the full bifter but the film edit is a masterpiece.
Cross of Iron: Gratuitously violent Sam Peckinpah film concerning German Troops on the Russian front. To be honest this was on TV one night after the pub so my memories of the plot are sketchy but I remember it being seriously gritty and brutal. James Coburn was in it.
Letters from Iwo Jima: THe other half of Clint's Iwo Jima double bill. Story of the Japanese defence of Iwo Jima. Lots of hare kiri being committed with grenades.
Downfall: German film about Adolf's last days. Quite a powerful film and the lead actor gave a f***ing scarily good performance that unfortunately went unrecognised at the Oscars (So Hitler's bad, but Idi Amin's good*?
)
Other great unmentioned films:
Dark Blue World: 2001 Czech film about 2 guys imprisoned after the soviets took over czechoslovakia after the war because they flew Spitfires for the RAF against the germans in the Battle of Britain. Whilst it's slow moving and a bit heavy at times, the flying scenes in the many flashbacks are so astounding that it's gotta be seen to be believed. If they could remake The Battle of Britain (somehow with the original cast) but use the cinematographer and aerial stunt director from this you'd have the greatest war film ever!
633 Squadron: Bad acting and hollow plot, this is still a bit of a gem. It's a fictional piece about a squadron of Mosquito fighter/bombers who are given a mission to destroy a heavy water plant at the back of a Norwegian fjord. The aerial sequences are brilliant for it's time (1960's) and the actual bombing mission up the fjord is basically what inspired George Lucas to do the canyon run on the death star in Star Wars.
Attack force Z. Actually I was a kid when I saw this so it could very well be a load of shite but it's an aussie film that's not been mentioned (and a damn sight less tedious than Kokoda). It stars a young Mel Gibson and is about commandos killing japs on a remote island. I liked it at the time.
There are dozens more out there but I need to get back to GTA4, I only came up to check my emails. Bloody farkin!
*For the record Last King of Scotland was ace and Forest Whitaker well deserved the nod but for Downfall to get largely ignored (to be fair it got a best foreign language nomination) seems a bit like cutting off ones nose to spite ones face.