Hincks served with the 10th Battalion in the Gallipoli Campaign, coming ashore at Anzac Cove on 25 April 1915 ahead of the main landing of Australian forces. On 28 April, Hincks was promoted to Corporal, and on 4 August to Sergeant. In September 1915, Hincks was evacuated to Mudros after he was found to be suffering from influenza and an intestinal disease. In October he was admitted to hospital in Cardiff, and nearly a year later he was discharged from hospital in Salisbury and returned to rejoin his unit at the Western Front on 23 August 1916.