Based on the question above the answer is The muddy trenches from war starts to cause insects and rodents such as rats to come through and make living conditions harsh. Most of the time the mix of the weather and the muddy trenches makes your feet wet and cold. Over a long time in those conditions can make your body go into shock or Hypothermia. In war Soldiers would have benches to keep them out of constant mud every time they would walk around or shoot at the enemy