The title of the First Naval Lord was changed to First Sea Lord on the appointment of Sir Jackie Fisher in 1904. In 1917 the First Sea Lord was re-styled First Sea Lord and Chief of the Naval Staff. From 1923 onward, the First Sea Lord was a member of the Chiefs of Staff Committee, and from 1923 to 1959, in rotation with the representatives of the other services (the Chief of the Imperial General Staff and Chief of the Air Staff), he served as the chairman of that committee and head of all British armed forces. The title was retained when the Board of Admiralty was abolished in 1964 and the Board's functions were integrated into the Ministry of Defence.