Admiralty
It evolved from *Admiralty Navy War Council, (1909–1912) which in turn became the Admiralty War Staff, (1912–1917) before finally becoming the Admiralty Naval Staff in 1917. It was the former senior command, operational planning, policy and strategy department within the British Admiralty. It was established in 1917 and existed until 1964 when the department of the Admiralty was abolished, and the staff departments function continued within the Navy Department of the Ministry of Defence until 1971 when its functions became part of the new Naval Staff, Navy Department of the Ministry of Defence.
History of the Royal Navy
Dealing with the matter of naval administration during the 15th century the most significant development was the establishment of the first Admiralty of England this was brought about in 1412 when the remaining geographic 'admiralties' the Northern Admiralty and Western Admiralty were abolished and their functions were unified under a single administrative and operational command the Admiralty Office later called the Admiralty and Marine Affairs Office.