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.
Royal Navy
In 1859, the fleet was estimated to number about 1000 in all, including both combat and non-combat vessels. In 1889, Parliament passed the Naval Defence Act, which formally adopted the 'two-power standard', which stipulated that the Royal Navy should maintain a number of battleships at least equal to the combined strength of the next two largest navies.
The first major action that the Royal Navy saw during this period was the Bombardment of Algiers in 1816 by a joint Anglo-Dutch fleet under Lord Exmouth, to force the Barbary state of Algiers to free Christian slaves and to halt the practice of enslaving Europeans. During the Greek War of Independence, the combined navies of Britain, France and Russia defeated an Ottoman fleet at the Battle of Navarino in 1827, the last major action between sailing ships. During the same period, the Royal Navy took anti-piracy actions in the South China Sea. Between 1807 and 1865, it maintained a Blockade of Africa to counter the illegal slave trade. It also participated in the Crimean War of 1854–56, as well as numerous military actions throughout Asia and Africa, notably the First and Second Opium Wars with Qing dynasty China. On 27 August 1896, the Royal Navy took part in the Anglo-Zanzibar War, which was the shortest war in history.