“War is always a negative-sum outcome. It subtracts, removes, empties. No one who has witnessed combat can, with any honesty, describe it another way. “We know more about war than we know about peace,” said five-star general Omar Bradley in an Armistice Day address a few years after the end of World War II, “more about killing than we know about living.” Think of it like this. For every soldier’s grave in places such as Arlington or Anzio or Normandy, there are more forgotten burial sites for civilians—parents, children, newlyweds, and newborns—claimed in some way by the same fighting.”