Great choices guys! Lot of movies I love there!
If I may point out a few less known movies?
"The Great Raid": US 2005
US Army Rangers and Filipino freedom fighters liberate POWs from a massive Japanese prison camp in the Phillipines. Personally I like it better than 'Saving Private Ryan' and wish it were better known. Sticks pretty close to the actual raid on the Cabanatuan POW camp other than adding a fictional romantic sub-plot (of course!) though it does allow them to show the suffering of the Fillipino civilians during the Japanese occupation. Most of the material was drawn from a great book called 'Ghost Soldiers' which is well worth looking up.
"The Flowers of War": China 2011
During the 'Rape of Nanking' an American freebooter, a dozen Catholic schoolgirls, and a group from the red light district seek shelter in a church. Amazing movie about sacrifice and protecting the helpless and innocent
"Tae Guk Gi: The Brotherhood of War": South Korea 2004
A young Korean man signs up for the army to protect his naive and innocent younger brother who has been drafted during the Korean War. As the war rages on he ends up losing his innocence as his brother holds onto his.
"The Eternal Zero": Japan 2013
A listless young Japanese man finds out his grandmother was married to a pilot killed during the Second World War before she married the man he calls grandpa. And her original husband is actually his biological father. The young man seeks out vets who knew his grandpa only to find out he was a coward only interested in saving his own skin. But grandpa was killed on a kamikaze mission. If grandpa was a coward why did he sign up for a suicide mission? Please ignore the horrible music on the trailer, great movie and that gawdawful pop song only pops up for the ending credits...
On a lighter note:
"Railroad Tigers": China 2017
Reminded me of a modern Chinese version of 'Kelly's Heroes.' Jackie Chan and his team of screwball Chinese partisians take on the Japanese Army. I laughed till my sides hurt...