The 1st Division's artillery was in action from the start of the Third Battle of Ypres on 31 July 1917 but the infantry were not called upon until the second phase of the battle commenced on 20 September with the Battle of Menin Road. Attacking across front, along with ten other divisions, including the Australian 2nd Division on their left, the 1st Division captured around of ground, securing Glencorse Wood and gaining a foothold in Polygon Wood. The Australian divisions suffered 5,000 casualties from the battle – the 1st Division lost 2,754 men – mainly due to retaliatory shelling from heavy artillery after the advance had completed.