“…Compared with blood components that can be processed, tested, freeze-dried, packaged, stored, shipped, and reconstituted, fresh whole blood was considered to be logistically impractical, wasteful, and unsafe. Military physicians, however, never lost sight of the known benefits of whole blood, [1][2][3][4] and the practice of FWB transfusion from combat hospitals in World War II [5][6][7] continues to this day. Military surgical teams utilize FWB by relying on a "walking blood bank" of soldier donors when blood requirements outpace supplies or when coagulopathic patients require blood products unavailable at their current echelon of care-two conditions that often coincide.…”