I'll chip in.
Hint, relatively new war movie (2004).
Hardness, 9.9, reasonably obscure, and a foreign film too.
Good luck.
Okay, I blatantly cheated and in ask.com asked "south korea's answer to saving Private Ryan". At least I knew the right clue to find it.
It's Tae Guk Gi: The Brotherhood of War.
I rented it some time ago. Good flick.