Shortly after the outbreak of the First World War, Burton enlisted in the Australian Imperial Force on 18 August 1914 and posted to the 7th Battalion. He embarked with the battalion for the Middle East on 19 October 1914. On 25 April 1915, 7th Battalion landed at Gallipoli but Burton was sick and did not reach the frontlines until a week later. He was promoted to the rank of lance corporal on 10 July 1915 for "having volunteered and taken part in the forcing of Saphead D21 in the face of the enemy".