The 1/4th Battalion served with the 146th Infantry Brigade, 49th (West Riding) Infantry Division throughout the War. The Battalion first saw action when it was transferred to Norway in April 1940 as part of the disastrous British and French intervention against the German invasion, serving as part of "Mauriceforce" at Namsos under Major General Adrian Carton de Wiart. The Battalion was soon evacuated and was moved to Iceland with the rest of the 49th Division in May 1940 as part "Alabasterforce", where they were part of the occupying garrison until returning to England in August 1942. Following training for the invasion of France, the Battalion did not land on D-Day but landed in France on 9 June 1944 and was soon fighting in the Battle of Normandy. The 1/4th Battalion fought during the battle for Caen during Operation Martlet, the Second Battle of the Odon and later clearing the Channel Coast in Operation Astonia, garrisoning "The Island" during the aftermath of Operation Market Garden, where they then fought in the Battle of the Scheldt. The Battalions' last battle was during the Second Battle of Arnhem.