The Jeep was born from a bid by the U.S. Army for a small, all-terrain vehicle with four-wheel-drive. Developed in just seven weeks, with bits of design from three different automakers — Bantam, Willys and Ford — Detroit eventually built more than 1 million for victory in World War II. Ernie Pyle called the Jeep "as faithful as a dog, as strong as a mule and agile as a goat." After the war, Willys-Overland sold them as glorified farm implements, complete with a power-takeoff hitch. Here's an example of the excitement from the Jeep's birth, as it goes through testing around Ford in the winter of 1941.