US Marine Corps (USMC) Lance Corporal (LCPL) Mathew D. Birchfield, a Motor Transport Mechanic, waits in a forward treatment center holding area, after being diagnosed with a brain hemorrhage and a cracked skull caused by a gunshot, during Vernal Tide, a Medical Augmentary Program Exercise (MAPEX) in which personnel from the Naval hospital are augmented to and support 3rd Medical Battalion, 3rd Force Service Support Group to facilitate forward and rear medical attention centers as in real combat situations when mass casualties are in need of immediate attention