From 1939-1945 during the Second World War C.C.M.'s cycle's manufacturing facilities were taken over by the Canadian government and declared an essential war service. Two simple, one-speed bicycles were manufactured and then shipped in wooden packing crates to the Canadian army. They produced motorcars, which have allegedly been used as light military vehicles. Due to a rubber shortage in 1942, the pedals of C.C.M. Rambler bicycles had wooden blocks. According to WWII veterans, the Rambler was popular with U.S. and British armed forces as well as Canadians.