A Defence Review is the process by which government of the United Kingdom decides upon its overall defence policy and upon the means and resources devoted to achieving its defence objectives. Such reviews can happen when political or economic factors dictate, such as upon a change of Government. The Defence Review will normally result in the publication of a policy document, styled a White Paper and released to parliament as a Command paper, setting out the broad aims, objectives, and rationale for the policy and strategy.
The United Kingdom governmental carries out Defence Reviews infrequently, usually upon a change of government or major political event, such as just after the Collapse of Communism. They can also be necessitated by economic crises, as in 1974 and 2010.
British Defence Reviews since the end of World War II include:
United Kingdom governments have also conducted policy reviews which cover specific aspects of defence but do not purport to be fundamental reappraisals of overall defence policy and strategy. Examples of these include:
The main difference between the United Kingdom Ministry of Defence and the United States Department of Defense as pertains to the review cycle is frequency. The U.S. DoD carries out its review, styled the Quadrennial Defense Review, on a set four-year cycle, whereas the UK MoD has no set timetable for any such review.
In nuclear strategy, minimal deterrence, also known as minimum deterrence and finite deterrence, is an application of deterrence theory in which a state possesses no more nuclear weapons than is necessary to deter an adversary from attacking. Pure minimal deterrence is a doctrine of no first use, holding that the only mission of nuclear weapons is to deter a nuclear adversary by making the cost of a first strike unacceptably high. To present a credible deterrent, there must be the assurance that any attack would trigger a retaliatory strike. In other words, minimal deterrence requires rejecting a counterforce strategy in favor of pursuing survivable force that can be used in a countervalue second strike.
Mutual assured destruction (MAD) is a doctrine of military strategy and national security policy which posits that a full-scale use of nuclear weapons by an attacker on a nuclear-armed defender with second-strike capabilities would result in the complete annihilation of both the attacker and the defender. It is based on the theory of rational deterrence, which holds that the threat of using strong weapons against the enemy prevents the enemy's use of those same weapons. The strategy is a form of Nash equilibrium in which, once armed, neither side has any incentive to initiate a conflict or to disarm.
Nuclear strategy involves the development of doctrines and strategies for the production and use of nuclear weapons.
In nuclear ethics and deterrence theory, no first use (NFU) refers to a type of pledge or policy wherein a nuclear power formally refrains from the use of nuclear weapons or other weapons of mass destruction (WMD) in warfare, except for as a second strike in retaliation to an attack by an enemy power using WMD. Such a pledge would allow for a unique state of affairs in which a given nuclear power can be engaged in a conflict of conventional weaponry while it formally forswears any of the strategic advantages of nuclear weapons, provided the enemy power does not possess or utilize any such weapons of their own. The concept is primarily invoked in reference to nuclear mutually assured destruction but has also been applied to chemical and biological warfare, as is the case of the official WMD policy of India.
The 1966 Defence White Paper was a major review of the United Kingdom's defence policy initiated by the Labour government under Prime Minister Harold Wilson. The review was led by the Secretary of State for Defence, Denis Healey. The document was centred on the need to support NATO in Europe and made the commitment that the UK, "would not undertake major operations of war except in co-operation with allies." The 1966 announcements undertook to retain the UK presence in Singapore and Malaysia.
Canada has not officially maintained and possessed weapons of mass destruction since 1984 and, as of 1998, has signed treaties repudiating possession of them. Canada ratified the Geneva Protocol in 1930 and the Nuclear Non-proliferation Treaty in 1970.
Deterrence theory refers to the scholarship and practice of how threats of using force by one party can convince another party to refrain from initiating some other course of action. The topic gained increased prominence as a military strategy during the Cold War with regard to the use of nuclear weapons and is related to but distinct from the concept of mutual assured destruction, according to which a full-scale nuclear attack on a power with second-strike capability would devastate both parties. The central problem of deterrence revolves around how to credibly threaten military action or nuclear punishment on the adversary despite its costs to the deterrer. Deterrence in an international relations context is the application of deterrence theory to avoid conflict.
Deterrence & Survival in the Nuclear Age, commonly referred to as the Gaither report, is a report submitted in November 1957 to the United States National Security Council and the U.S. president concerning strategy to prepare against the perceived threat of a nuclear attack from the Soviet Union.
In 1952, the United Kingdom became the third country to develop and test nuclear weapons, and is one of the five nuclear-weapon states under the Treaty on the Non-Proliferation of Nuclear Weapons.
The US–UK Mutual Defense Agreement, or the 1958 UK–US Mutual Defence Agreement, is a bilateral treaty between the United States and the United Kingdom on nuclear weapons co-operation. The treaty's full name is Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the uses of Atomic Energy for Mutual Defense Purposes. It allows the US and the UK to exchange nuclear materials, technology and information. The US has nuclear co-operation agreements with other countries, including France and other NATO countries, but this agreement is by far the most comprehensive. Because of the agreement's strategic value to Britain, Harold Macmillan called it "the Great Prize".
Sir Michael Edward Quinlan, GCB was a former British defence strategist and former Permanent Under-Secretary of State for Defence, who wrote and lectured on defence and matters of international security, especially nuclear weapon policies and doctrine, and also on concepts of 'Just War' and related ethical issues.
The Dreadnought class is the future replacement for the Royal Navy's Vanguard class of ballistic missile submarines. Like their predecessors they will carry Trident II D-5 missiles. The Vanguard submarines entered service in the United Kingdom in the 1990s with an intended service life of 25 years. Their replacement is necessary for maintaining a continuous at-sea deterrent (CASD), the principle of operation behind the Trident system.
Franklin Carroll Miller is a foreign policy and nuclear defense policy expert. Miller served 31 years in the U.S. government, including the Department of State, the Department of Defense and a Special Assistant to President George W. Bush. He is principal at the Washington-based international business advisory firm The Scowcroft Group.
Trident, also known as the Trident nuclear programme or Trident nuclear deterrent, covers the development, procurement and operation of nuclear weapons in the United Kingdom and their means of delivery. Its purpose as stated by the Ministry of Defence is to "deter the most extreme threats to our national security and way of life, which cannot be done by other means". Trident is an operational system of four Vanguard-class submarines armed with Trident II D-5 ballistic missiles, able to deliver thermonuclear warheads from multiple independently targetable re-entry vehicles (MIRVs). It is operated by the Royal Navy and based at Clyde Naval Base on the west coast of Scotland. At least one submarine is always on patrol to provide a continuous at-sea capability. The missiles are manufactured in the United States, while the warheads are British.
Sir Lawrence David Freedman, is a British academic, historian and author specialising in foreign policy, international relations and strategy. He has been described as the "dean of British strategic studies" and was a member of the Iraq Inquiry. He is an Emeritus Professor of War Studies at King's College London.
The United Kingdom's Polaris programme, officially named the British Naval Ballistic Missile System, provided its first submarine-based nuclear weapons system. Polaris was in service from 1968 to 1996.
The Full spectrum deterrence (previously known as Minimum Credible Deterrence is the defence and strategic principle on which the atomic weapons programme of Pakistan is based. This doctrine is not a part of the nuclear doctrine, which is designed for the use of the atomic weapons in a full-scale declared war if the conditions of the doctrine are surpassed. Instead, the policy of the Minimum Credible Deterrence falls under minimal deterrence as an inverse to the Mutually Assured Destruction, which is widely regarded as designed to dissuade India from taking any military actions against Pakistan, as it did in 1971, when Pakistan started the war. Pakistan refuses to adopt No first use policy, while the other regional powers, India and China, have adopted the policy. Pakistan's foreign minister Shamshad Ahmad had warned that if Pakistan is ever invaded or attacked, it will use "any weapon in its arsenal" to defend itself.
A tripwire force is a strategic approach in deterrence theory. The tripwire force is a military force smaller than that of a potential adversary, which is designed to signal the defending side's commitment to an armed response to future aggression without triggering a security spiral.
In 1952, the United Kingdom was the third country to develop and test nuclear weapons, after the United States and Soviet Union. and is one of the five nuclear-weapon states under the Treaty on the Non-Proliferation of Nuclear Weapons.
The Integrated Review of Security, Defence, Development and Foreign Policy, often known as the Integrated Review, and titled as Global Britain in a Competitive Age, was a review carried out by the British government led by Boris Johnson into the foreign, defence, security and international development policies of the United Kingdom. Described by Johnson as "the largest review of its kind since the Cold War", the review was published on 16 March 2021.