The 13th (Western) Division landed at Anzac on the Gallipoli peninsula in July 1915 in preparation for the Battle of Sari Bair (The August Offensive) beginning on 6 August. Although all of its component infantry battalions arrived, the Division's artillery did not arrive for some months. Initially in reserve to the main break-out from Anzac by units of the New Zealand and Australian Division, the 38th and 39th Brigades were sent in as reinforcements as the attack stalled.