The Willys MB and the Ford GPW, both formally called the U.S. Army Truck, 1/4 ton, 4x4, Command Reconnaissance, commonly known as Jeep or jeep, and sometimes referred to as G503 are light, off-road capable, military utility vehicles that were manufactured during World War II (from 1941 to 1945) to help mobilize the Allied forces.

  • In Service: 1941 until varying by country
  • Wars: WWII, Korean War, Various post 1945 conflicts
  • Designer: Karl Probst, Delmar G. Roos
  • Production Totals: MB - 359,489 GPW - 277,896
  • Weight: 2,453 lbs wet 2,337 dry weight
  • Length: 132.25 inches
  • Width: 62 inches
  • Height: overall top up - 69.75 inches reducible to 52 inches
  • Engine: 134 cu inch (2.2l) Inline 4 Willys L134 "Go Devil", 60hp
  • Transmission: 3 speed x2 range transfer case
  • Suspension: Live axles on leaf springs front and rear 


The design of the World War II jeep was the result of a long process, involving the contributions of both U.S. military officers and civilian engineers, the latter mostly tied to three companies: Bantam, Willys and Ford, and has repeatedly been called a design by committee. In fall 1941, Lt. E.P. Hogan of the U.S. Quartermaster Corps wrote: "Credit for the original design of the Army's truck ​1⁄4-ton, 4x4, may not be claimed by any single individual or manufacturer. 

*Sources: Wikipedia, KaiserWillys Blog,,