A Ministry of Defence or Defense , also known as a Department of Defence or Defense, is the common name for a part of the government found in states where the government is divided into ministries or departments, responsible for matters of defence. Such a department usually includes all branches of the military, and is usually controlled by a Defence Minister, Minister of Defence, or Secretary of Defense.
The tendency to consolidate and rename these departments to highlight their purpose as providing “defence”, and to coordinate until then mostly separate components of defence arose after World War II.
