The Battle of Sari Bair, also known as the August Offensive, represented the final attempt made by the British in August 1915 to seize control of the Gallipoli peninsula from the Ottoman Empire during the First World War.

General Sir John Monash, was an Australian civil engineer and military commander of the First World War. He commanded the 13th Infantry Brigade before the war and then, shortly after its outbreak, became commander of the 4th Brigade in Egypt, with whom he took part in the Gallipoli campaign. In July 1916 he took charge of the newly raised 3rd Division in northwestern France and in May 1918 became commander of the Australian Corps, at the time the largest corps on the Western Front. According to A. J. P. Taylor he was "the only general of creative originality produced by the First World War".