I'm a war movie fan, so I don't have an absolute favorite. Of recent offerings I would say that "Blackhawk Down" is very good. It's brutal and raw. "Das Boot" and "Stalingrad" are great. "Tora, Tora, Tora" is the best take on Pearl Harbor as is "A Bridge Too Far" on the air drop over Holland. If you are interested in air war, "The Battle of Britain" is good.