If servicemen need food from the local civilian population, their commanding officer is issued with special money orders to buy it. Change the word Killing for Death. Lets look at the good work that the Armed Forces do. Once the war has been won, anywhere in the world, the people try to get back onto their feet. The entire infrastructure from international commerce to basic survival has been destroyed.
People are homeless, there is often no power, no safe water, no food.
Diseases like Cholera and Typhus start becoming common. People are aimlessly looking for relatives and friends. It needn't be a war that causes these problems. Natural disasters like floods, earthquakes, volcanoes, Tsunami etc, are big killers and destroyers as well. Enter the armed forces.