Steve recommended the movie "To End All Wars" (see below), so I took advantage of a slow evening and saw it. Steves right, it is a tremendous work. An intense and serious film, one that moves between political philosophy and Christianity with amazing deft. It is realistic, of course, and therefore is about justice, but then moves beyond, to redemption. Thanks to Steve for recommending it. Hes right, best movie I never heard of.
may also wish to check out the 2004 independent film "Saints and Soldiers," available from Netflix. While set in the European theater (purportedly its based on a true episode that happened after the notorious Malmedy Massacre during the early phase of the Battle of the Bulge) it explores some of the same spiritual and moral themes that the superb "TEAW" examines.