In 1942, the Montreal Locomotive Works mounted a 25-pounder gun on a modified Canadian Ram tank chassis to produce the Sexton. The Sexton's tracked drive train meant it could more easily keep up with advancing forces than conventional artillery, which had to be towed by gun tractors. Its armor also helped protect its crew from shell fragments and small arms fire. Some 2,150 Sextons were built and saw service with Canadian, British, and other Allied forces. After the war, the Sexton remained in service with the Canadian army until the 1950s.