{{unsourced, date=February 2021 Ministry of Defense Astana

A ministry of defence or defense (see

spelling differences Despite the various English dialects spoken from country to country and within different regions of the same country, there are only slight regional variations in English orthography, the two most notable variations being British and American ...

), also known as a department of defence or defense, is an often-used name for the part of a

government A government is the system or group of people governing an organized community, generally a state. In the case of its broad associative definition, government normally consists of legislature, executive, and judiciary. Government i ...

responsible for matters of defence, found in states where the government is divided into ministries or departments. Such a department usually includes all branches of the

military A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distinct ...

, and is usually controlled by a

defence minister A defence minister or minister of defence is a cabinet official position in charge of a ministry of defense, which regulates the armed forces in sovereign states. The role of a defence minister varies considerably from country to country; in s ...

, minister of defence, or secretary of defense. Historically, such departments were referred to as a Ministry of War or Department of War, although such departments generally had authority only over the army of a country, with a separate department governing other military branches. Prior to

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...

, most "Ministries of War" were Army ministries, while the Navy and the Air Force, if it existed as a separate branch, had their own departments. As late as 1953, for example, the

Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen nationa ...

had a "Ministry of War" alongside a "Ministry of the Navy". The tendency to consolidate and rename these departments, and to coordinate until then mostly separate components of defence (air, land, navy) arose after World War II.

See also