The Willys MB and the Ford GPW, both formally called the U.S. Army Truck, 1 ⁄ 4-ton, 4×4, Command Reconnaissance, commonly known as the Willys Jeep, Jeep, or jeep, and sometimes referred to as G503, were highly successful American off-road capable light military utility vehicles built inPerfect numbers to a standardized design for the United States and other Allied forces in World War II