War II. The White Motor Company, which had designed armored cars for the United States Army and United States Marines, continued after the First World War to develop armored cars and added tracks for the M2 half-track car and M3 half-track. Autochenille and autoneige There were many civilian half-track experiments in the 1920s and 1930s. The Citroën company sponsored several scientific expeditions crossing deserts in North Africa and Central Asia, using their autochenilles. After World War I, the US military wanted to develop a semi-tracked personnel carrier vehicle, so it looked at these civilian half-tracks. In the late 1920s the US Army purchased several Citroën-Kégresse vehicles for evaluation followed by a licence to produce them. This resulted in the Army Ordnance Department building a prototype in 1939. In September 1940 it went into production with the military M2 and M3 half-track versions. With the snow and ice of Canada in mind, Joseph-Armand Bombardier developed 7- and 12-passenger half-track autoneiges in the 1930s, starting what would become the Bombardier industrial conglomerate. The Bombardier vehicle had tracks for propulsion in the rear and skis for steering in front. The skis could be replaced with wheels in the summer, but this was uncommon. The Red Army also experimented with half-tracks, such as the BA-30, but found them expensive and unreliable. Although not a feature on American World War II vehicles, steering could be assisted by track braking, controlled by the steering wheel. World War II half-track use In the US, 43,000 halftracks were produced by three primary manufacturers, the largest being the White Motor Company, the original designer, with a total of 15,414 accepted by the War Department. The other manufacturers, Autocar and Diamond T, built 12,168 and 12,421, respectively. These designs were produced under license in Canada, and were widely supplied under the Lend Lease program, with 5,000 supplied to the USSR alone. The fourth manufacturer of American-made half-tracks was the International Motor Truck Corporation division of International Harvester. IH built approximately 12,853 half-tracks, which were shipped to Europe for use by British and French troops. In 1942, they produced 152 M5 units and 5 M14 units at the Springfield Works; in 1943 they produced 2,026 M9 units, 1,407 M0A1 units, 4,473 M5 units, 1,600 M14 units, and 400 M17 units, all at the Springfield Works; in 1944 they produced 1,100 M5A1 units and 1,100 M17 units also at the Springfield Works;