The 13th (Service) Battalion landed at Boulogne-sur-Mer as part of the 111th Brigade in the 37th Division in July 1915 for service on the Western Front. The battalion saw action at the Battle of Loos in September 1915, the Battle of the Somme in Autumn 1916 and the advance to the Hindenburg Line as well as the Battle of Arras in April 1917, the Battle of Passchendaele in Autumn 1917 and the Battle of Cambrai in November 1917 before taking part in the Battle of the Lys in April 1918, the Third Battle of the Aisne in May 1918, the Second Battle of the Somme in August 1918, the Battles of the Hindenburg Line and the Final Advance in Picardy.