In 1939, the battery moved to France, where they were equipped with the 25-pounder gun, towed by the Morris Quad. In June 1940, with the 51st (Highland) Division, it suffered severe losses at St Valery. After reforming in England in late 1940, B Battery departed for the Middle East, as part of the Desert Rats. It fought in all the major battles in the Middle East Theatre of Operations. Most significantly, during the Siege of Tobruk the Battery was in constant action. The Battery also fought notably at Derna, the First Battle of El Alamein, Alam el Halfa and the Second Battle of El Alamein. It was at Alam el Halfa that the battery supported 133 Infantry Brigade firing onto the 21. Panzer Division, knocking out or damaging some 30 German tanks. Sometime between 1942 and 1945 the battery was retrained on the 105mm Priest and were involved in the Battles for the Gothic Line and River Po in Italy.