Marmon-Herrington (MH) got off to a successful start in March 1931, when the company procured contracts for 33 T-1 4x4 aircraft refueling trucks, powered by 6-cylinder Hercules engines, followed by a variety of 4x4 and 6x6 vehicles for the U.S. and Persian armies, for use as general load carriers, towing light weaponry, mobile machine shops, and wreckers. Reconnaissance, scout and armored cars were also made, some with four-wheel steering as well as four-wheel drive. In 1932 Marmon-Herrington built the first all-wheel-drive truck and trailer combination, and the largest trucks ever built at the time, for oil pipe construction in Iraq. Construction of all-wheel-drive (AWD) vehicles and conversion of existing vehicles to AWD were among the company's products. MH's all-wheel-drive conversions of Ford light trucks were successfully sold to the military of both the U.S. and several foreign governments.<br>