Willys MB Jeep, 4th Marine Division, 14th Marine Artillery, Iwo Jima - 1945. The Willys MB US Army Jeep, along with the nearly identical Ford GPW, was manufactured from 1941 to 1945. They are considered the iconic World War II Jeep. Over the years, the World War II Jeep later evolved into "CJ" civilian jeep and has been recognized as a symbol of rugged individualism in twentieth century American History.