In making the transition from civilian emergency care to the tactical setting, it is useful in considering the management of casualties that occurs in a combat mission as being divided into three distinct phases.
a. Care Under Fire. Care under fire is the care rendered by the soldier medic at the scene of the injury while he and the casualty are still under effective hostile fire. Available medical equipment is limited to that carried by the individual soldier or the soldier medic in his medical aid bag.
b. Tactical Field Care. Tactical field care is the care rendered by the soldier medic once he and the casualty are no longer under effective hostile fire. It also applies to situations in which an injury has occurred, but there is no hostile fire. Available medical equipment is still limited to that being carried into the field by medical personnel. The time needed to evacuate the casualty to a medical treatment facility (MTF) may vary considerably.
c. Combat Casualty Evacuation Care. Combat casualty evacuation (CASEVAC) care is the care rendered once the casualty has been picked up by an aircraft, vehicle, or boat. Additional medical personnel and equipment may have been pre-staged and are available at this stage of casualty management.