Fires On The Plain (1959)
Director: Kon Ichikawa
The year is 1945, and the setting is the (just barely) Japanese-occupied Philippines. Japan has been losing the war and its army has been reduced by lack of supplies and manpower. As things go from bad to worse, discipline breaks down too, and the army begins to resemble a gang of convicts more than a fighting force. Soon it becomes a brutish fight for survival.