The 5th (Huntingdonshire) Battalion was assigned to the 143rd Infantry Brigade, part of the 48th (South Midland) Infantry Division. The 48th Division was sent to join the British Expeditionary Force in France in early 1940, the first Territorial division to be sent overseas in the Second World War, and the battalion was exchanged for the 1st Battalion, Oxford and Bucks Light Infantry and transferred to the 11th Infantry Brigade, 4th Infantry Division. It saw extensive service in France, Tunisia, Sicily and Italy before ending the war in Austria.