The division was transferred to I ANZAC Corps around this time, swapping with the New Zealand Division. The division's stay at Armentières was brief and it soon accompanied the 1st and 2nd Divisions to the Somme sector where the British had launched an offensive in July. In August 1916, it relieved the 2nd Division on the Pozières heights, arriving in time to fight off a determined German counterattack. The attack fell largely on a small number of battalions, with the South Australian 48th Battalion losing nearly 600 men killed or wounded; the New South Welshman of the 45th Battalion were called upon to help a neighbouring British unit capture a position dubbed "Munster Alley", during which they lost 345 men. Meanwhile, an attack on the 14th Battalion was repulsed after an individual effort by Lieutenant Albert Jacka, who had previously received the Victoria Cross for actions at Gallipoli.