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Armed forces of the United Kingdom

British Armed Forces
MinistryofDefence.svg
Service branches
Headquarters Ministry of Defence, London
Leadership
Commander-in-Chief Queen Elizabeth II
Head of Her Majesty's Government Theresa May
Defence Secretary Sir Michael Fallon
Chief of the Defence Staff Air Chief Marshal Sir Stuart Peach
Manpower
Military age 16
Conscription No
Active personnel 153,770
Reserve personnel 81,850
Expenditures
Budget £48 billion; FY 2017–18
(≈$58.6 billion)
Percent of GDP 2.0%; FY 2015–16
Industry
Domestic suppliers BAE Systems
Rolls-Royce Holdings
Related articles
History Military history of the United Kingdom
Conflicts involving the UK

The British Armed Forces, also known as Her Majesty's Armed Forces, the Armed Forces of the Crown, are the military services which are tasked with defence of the United Kingdom, its overseas territories, and the Crown dependencies. They also promote Britain's wider interests, support international peacekeeping efforts, and provide humanitarian aid.

Since the formation of a Kingdom of Great Britain in 1707 (later succeeded by the United Kingdom), the armed forces have seen action in a number of major wars involving the world's great powers, including the Seven Years' War, the Napoleonic Wars, the Crimean War, the First World War, and the Second World War. Repeatedly emerging victorious from conflicts has allowed Britain to establish itself as one of the world's leading military and economic powers.

Today, the British Armed Forces consist of: the Royal Navy, a blue-water navy with a fleet of 77 commissioned ships; the Royal Marines, a highly specialised amphibious light infantry force; the British Army, the UK's principal land warfare branch; and the Royal Air Force, a technologically sophisticated air force with a diverse operational fleet consisting of both fixed-wing and rotary aircraft. The Commander-in-chief of the British Armed Forces is the British monarch, Queen Elizabeth II, to whom members of the forces swear allegiance. The UK Parliament approves the continued existence of the armed forces by passing an Armed Forces Act at least once every five years, as required by the Bill of Rights 1689. The armed forces are managed by the Defence Council of the Ministry of Defence, headed by the Secretary of State for Defence.


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