A Visual History of the U.S. Army's WWII Tank Destroyer In late 1941 the concept of a separate tank destroyer force began to jell. This force would be armed with specialized weapons. While the army's primary antitank weapons of the late 1930s were 37mm towed anti-tank guns, these were soon deemed to be inadequate against enemy armor. Accordingly, the quest for larger weapons began, as did the desire for a self-propelled antitank gun, or Gun Motor Carriage. The initial efforts, which involved adapting 3/4-ton, Dodge trucks to mount antitank weapons (the M6, nee WC-55), which were intended as interim and training vehicles. Product Information: ISBN: 9781944367190 Author: David Doyle Publisher: The Ampersand Group Format: Paperback Pages: 128 Dimensions: 22 z 28 x 1cm.