The 1st battalion landed at Le Havre as part of the 15th Brigade in the 5th Division in August 1914 for service on the Western Front. It took part in the Battle of Mons in August 1914, the First Battle of the Marne in September 1914, the First Battle of the Aisne also in September 1914, the Battle of La Bassée in October 1914, the Battle of Messines also in October 1914 and in the First Battle of Ypres also in October 1914. It also saw action at the Second Battle of Ypres in April 1915 and the Battle of Hill 60 also in April 1915. In 1917 they fought at the Battle of Arras in April 1917 and the Battle of Passchendaele in July 1917. It then took part in the Battle of the Lys in April 1918 and the Battles of the Hindenburg Line and the Final Advance in Picardy later in the year.