Field Artillery Regiments went, from Iceland to Malaya, primarily as a tractor for the, then new, 25-pounder gun. It was also used by most of the Commonwealth and Allied units equipped with the 25-pounder. It was a popular vehicle although really too small for all the equipment that was carried. It was also underpowered when towing and loaded. Moving 9 tons with a 70 bhp engine was not ideal, and its speed uphill was unspectacular. Considerable use had to be made of the winch on hills and in mud. Later in the war, when the anti-tank regiments were equipped with 6-pounder and 17-pounder guns, Quads were issued as tractors. Normally these guns were towed without a limber but some 17-pounders were towed with limbers. This can only have been for the aid of the limber's brake, and a smoother tow, as the ammunition would not fit in a limber. At the end of the War the Quad stayed in British service in the same roles. It saw extensive action in the Korean War and Malaya. Many of the Commonwealth and Allied forces took their Quads to their home countries, and were provided with more ex-British ones to fully re-equip. The Royal Netherlands Army subsequently made extensive use of theirs in the East Indies. The British rebuilt many of their Quads in the early 1950s, extending their useful life until 1959 when the last was sold off. They were replaced by three-ton tractors, derived from the Bedford RL and Fordson Thames E4. Variants Mark I Only 200 made in 1939 and very early 1940. Front axle had provision for a locking differential, and the axle itself was mounted above the springs. The vehicle had permanent four-wheel drive and 10.50 × 20 inch tyres. The accelerator pedal was mounted centrally rather than in the conventional position as the right-most pedal. Mark II Approximately 4000 made in 1940 and early 1941. It was almost identical to the Mk I, save for a change in front axle design, which removed the provision for the locking differential. Mark III Approximately 6000 made from 1941 to 1945. The front axle was mounted below the springs, and four-wheel drive could be switched on or off as required. Tyres were 10.50 × 16 inch size, and the accelerator was mounted conventionally as the right pedal. Three types of body were used: All Mk Is and approximately the first