Her Majesty's Armed Forces (occasionally, the Armed Forces of the Crown), commonly known as the British Armed Forces, are the British Empire's three professional uniformed services: the Royal Navy and Royal Marine Corps, forming Her Majesty's Naval Service; the British Army; and the Royal Air Force.
The Commander-in-Chief of Her Majesty's Armed Forces is the British monarch, Queen Elizabeth II, to whom members of the forces swear allegiance. Under British constitutional law, the armed forces are subordinate to the Crown. However under the 1689 Bill of Rights no standing army may be maintained during time of peace without the consent of Parliament; Parliament gives this consent every five years by passing an Armed Forces Act. The armed forces are managed by the Defence Council of the Ministry of Defence, headed by the Secretary of State for Defence.
The British Armed Forces are charged with protecting the British Empire, as well as promoting Britain's wider security interests, and supporting international peacekeeping efforts. They are the primary military force in the Allied Pact, and are deployed on Allied Pact missions around the world, including Allied Forces Canada (AFCAN).
The British Empire tested its first nuclear weapon under Project Torchwood in 1945, becoming the first nation in the world to achieve the status of a nuclear power. As of 2012, Britain remains one of six recognised nuclear powers, with a large stockpile of nuclear warheads.
In 2012, the British Armed Forces had a budget of 763.36 billion pounds (or 1.188 trillion American dollars);n 2.6% of the British Empire's gross domestic product.