As far as sub films go I'd have to agree. Three more to take into consideration, land war tho.
Flowers of war (
http://www.imdb.com/title/tt1410063/ )
City of Life and Death (
http://www.imdb.com/title/tt1124052/?ref_=sr_1 )
both movies are based on the raping of Nanking
Third has to be
Stalingrad (
http://www.imdb.com/title/tt0108211/?ref_=sr_1 )
This should definitely be watched in German with subtitles, imho.
Best regards.
Fubar2Niner