 If you liked
Jin-Rou
|
 ...then you might like
Hotaru no Haka
|
Jin-Rou also has war as central theme, a lot of disturbingly realistic violence, beautiful animation and will mostly likely depress the hell out of you by the time you reach the end of the movie.
(don't watch Jin-Rou and Grave of the Fireflies in the same sitting, you'll go suicidal)