The 1st Battalion landed at Le Havre as part of the 11th Brigade in the 4th Division in August 1914 for service on the Western Front. The battalion saw action at the First Battle of the Marne in September 1914, the First Battle of the Aisne in September 1914 and the Battle of Messines in October 1914 as well as the Second Battle of Ypres in April 1915, the Battle of the Somme in Autumn 1916 and the Battle of Arras in April 1917 before taking part in the Battle of Passchendaele in Autumn 1917, the Battle of the Lys in April 1918, the Advance in Flanders, the Second Battle of the Somme in August 1918, the battles of the Hindenburg Line and the Final Advance in Picardy.