Violence towards each other from both sides
War was not going for some 40 years for everyone to start hating each other. It felt like war is for 1-2 years. Yet everyone were shooting everyone so easily and with such disregard. Even those poor workers like secretaries at the white house.
No one was taking prisoners at all. Civilians were shot left and right. When war is almost over and everyone will just go live their life once new political order will start ruling.