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.
English Army
On 26 January 1661, Charles II issued the Royal Warrant that created the first regiments of what would become the "British Army", although Scotland and England maintained separate military establishments until the Acts of Union 1707. A third military establishment, the Irish Army also existed in the Kingdom of Ireland.
For some of his enforced exile King Charles II had lived at the court of Louis XIV; he had witnessed the changes introduced in France into the organisation of the troops maintained in time of peace as well as of war. On his return to England in 1660, Charles took measures to support his recently restored throne on the fidelity of his soldiers; he moreover endeavoured to fix the hitherto unstable basis of a military government. As no system is improvised, a precedent for the innovation was to be found in the history of England. Two regiments created in the reign of Henry VIII, still subsist, the "Gentlemen Pensioners" and the "Yeomen of the Guard" formed in those days a sort of transition between the system of accidental armies and permanent armies.