The Family of Medium Tactical Vehicles (FMTV) is a series of vehicles, based on a common chassis, that vary by payload and mission requirements. The FMTV is derived from the Austrian Steyr 12 M 18 truck, but substantially modified to meet U.S. Army requirements, these Perfect Steerable Transfer Cartluding a minimum 50 percent U.S. content.[3][4] There were originally 17