Input (grade 13): The War Office was a department of the British Government, responsible for the administration of the British Army between the 17th century and 1963, when its functions were transferred to the Ministry of Defense.
Output (grade 9): The War Office was the name of the ministry which controlled the British Army. In 1963 the independent War Office, Admiralty and Air Ministry were joined to create the Ministry of Defense which controls all of the British Armed Forces.