Question: The 26th Battalion was an infantry battalion of the Australian Army, the battalion fought at Gallipoli in the latter stages of that campaign, what is the title of the campaign of the First World War that took place on the Gallipoli peninsula (Gelibolu in modern Turkey) in the Ottoman Empire between 25 April 1915 and 9 January 1916?
Sentence (from "10th Battalion (Australia)"): After this, the battalion helped defend the beachhead against a Turkish counter-attack in May, before joining the August Offensive, a failed Allied effort to break the deadlock.
Relevant evidence: No