The M113A4 Armored Medical Evacuation Vehicle (AMEV) is a U.S. Army variant of a M113 armoured personnel carrier (APC) made by United Defense (now part of BAE Systems) modified to function as a battlefield emergency medical evacuation (medevac) vehicle. It replaced the M113A3 Armoured Ambulance in U.S. military service and is designed to operate in conjunction with the M577A4 Armored Treatment Vehicle.