The Jeep displayed here is a 1951 model, distinguished from the 1942-45 World War II Army-Marine model by its windshield without a divider bar. During World War II, President Eisenhower generally traveled by Jeep while serving as General of the U.S. Army, with Capt. K. Summersby as his driver, and he was photographed in a jeep in Europe in 1944. The jeep became the primary light wheeled transport vehicle of the U.S. military and its allies, and Eisenhower once called it one of three decisive weapons the U.S. had during World War II. It was the world's first mass-produced four-wheel drive car. General George Marshall called the little squared-off car America's greatest contribution to modern warfare. Photos of General Eisenhower and the Flying Jeep inspired posters and perhaps the nickname Leaping Lena. The Army's smallest toughest vehicle had many pet names, including jeep, peep, blitz-buggy, Leaping Lena, and panzer-killer. The name jeep was derived from the auto manufacturer stamp GPW (GP-Willys).