before taking part in the Battle of St Quentin in March 1918 and the Battle of the Avre in April 1918. The 9th (Service) Battalion landed at Boulogne-sur-Mer as part of the 42nd Brigade in the 14th (Light) Division in May 1915 for service on the Western Front and took part in most of the same battles as the 7th and 8th battalions. The 10th (Service) Battalion and 11th (Service) Battalion landed at Boulogne-sur-Mer as part of the 59th Brigade in the 20th (Light) Division in July 1915 for service on the Western Front. The battalions saw action at the Battle of Mont Sorrel in June 1916, the Battle of Delville Wood in September 1916 and the Battle of Guillemont in September 1916 as well as the Battle of Flers–Courcelette in September 1916, the Battle of Morval in September 1916 and the Battle of Le Transloy in October 1916 before taking part in the advance to the Hindenburg Line, the Battle of Langemarck in August 1917, the Battle of the Menin Road Ridge in September 1917, the Battle of Polygon Wood in September 1917 and the Battle of Cambrai in December 1917. The 12th (Service) Battalion landed at Boulogne-sur-Mer as part of the 60th Brigade in the 20th (Light) Division in July 1915 for service on the Western Front and took part in most of the same battles as the 10th and 11th battalions. The 12th battalion also took part in the action at Pietre, part of a subsidiary attack on the 25th of September 1915 during the battle of Loos where it advanced along in support of the Indian Corps. The battalion made good ground but retired when the units on both its flanks were forced back and it lost many many killed, wounded and missing during this withdrawal. 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