 11 (Naval) Squadron RNAS, a bomber squadron, from 11 March to 25 May 1918, during which time (on 1 April 1918) the Royal Naval Air Service was merged with the Army's Royal Flying Corps to form the Royal Air Force, and his unit became No.211 Squadron RAF.On 1 May 1919 he was appointed an acting major, and was transferred to the RAF unemployed list on 24 August 1919.