As war spread in Asia and war clouds gathered over Europe in the late 1930s, the US Army Quartermaster Corps set out to acquire a tough, new 2-1/2-ton tactical truck that would be up to the task of hauling modern artillery as well as troops and supplies. In the end, General Motors filled that need with its all-wheel-drive CCKW truck. The first examples rolled off GMC's Pontiac, Michigan, assembly line in February 1941. By September 1942, the Chevrolet...