From Jeep press:
In 1955, Kaiser introduced the CJ-5, based on the 1951 Korean War M-38A1, with its rounded front-fender design. It was slightly larger than the CJ-3B, as it featured an increased wheelbase and overall length. Improvements in engines, axles, transmissions and seating comfort made the CJ-5 an ideal vehicle for the public's growing interest in off-road vehicles. The CJ-5 featured softer styling lines, including rounded body contours. With an 81-inch wheelbase, more than 600,000 CJ-5s were produced over 30 years.