I'll chip in.
Hint, relatively new war movie (2004).
Hardness, 9.9, reasonably obscure, and a foreign film too.
Good luck.
Couldn't tell you the title, but it's been called South Korea's answer to Saving Private Ryan.
Speaking of obscure but good foreign war movies, here's one:
Hint: This is something you don't see too often - war from the Chinese Communist point of view.