The first B7 (B for Bombardier and 7 for 7 passengers) snowmobiles were sold during the winter of 1936–37 and were well received. A new plant able to produce more than 200 vehicles a year was built in 1940. A new 12-passenger model was made available in 1941 which was referred to as the B12, but demand was halted when Canada entered World War II. The B12 was manufactured by L’Auto-Neige Bombardier Limitée. Bombardier also brought to market a C18 which served the public as a school bus. Over 3,000 units of the B12/C18 were manufactured. Bombardier offered his expertise to the Canadian government and started producing specialized military vehicles for the Allies. Bombardier also produced specialized vehicles for logging and mining operations, which they called the Muskeg.