Stalingrad. It's from the German perspective though but it's a good one.
I would say, that this makes it a great one. It is very german
though, no happy end, no glory, no heroics, no cute and handsome people. Just ugly, ugly war.
Didn't Poland made a very good movie about Katyn recently? And has anybody seen "Defiance"? Both are on my watchlist, but haven't gotten around to see them yet.