The North Atlantic Treaty Organization, also called the North Atlantic Alliance, is an intergovernmental military alliance of 32 member states—30 European and 2 North American. Established in the aftermath of World War II, the organization implements the North Atlantic Treaty, signed in Washington, D.C., on 4 April 1949. NATO is a collective security system: its independent member states agree to defend each other against attacks by third parties. During the Cold War, NATO operated as a check on the threat posed by the Soviet Union. The alliance remained in place after the dissolution of the Soviet Union and the Warsaw Pact, and has been involved in military operations in the Balkans, the Middle East, South Asia, and Africa. The organization's motto is animus in consulendo liber. The organization's strategic concepts include deterrence.
Supreme Allied Commander is the title held by the most senior commander within certain multinational military alliances. It originated as a term used by the Allies during World War I, and is currently used only within NATO for Supreme Allied Commander Europe and Supreme Allied Commander Transformation.
The Supreme Headquarters Allied Powers Europe (SHAPE) is the military headquarters of the North Atlantic Treaty Organization's (NATO) Allied Command Operations (ACO) that commands all NATO operations worldwide. SHAPE is situated in the village of Casteau, near Mons, Belgium.
The Military Staff of the European Union (EUMS) is the directorate-general of the European Union's (EU) External Action Service (EEAS) that contributes to the EU's Common Security and Defence Policy (CSDP) by providing strategic advice to the High Representative (HR/VP) and commanding operations through its Military Planning and Conduct Capability (MPCC) operational headquarters. From the end of 2020, the MPCC will be capable of running executive operations of up to 2,500 troops, i.e. the size of one EU battle group, as well as 3 non-executive missions.
Allied Command Transformation (ACT) is a military command of the North Atlantic Treaty Organization (NATO), formed in 2003 after restructuring.
The Supreme Allied Commander Atlantic (SACLANT) was one of two supreme commanders of the North Atlantic Treaty Organisation (NATO), the other being the Supreme Allied Commander Europe (SACEUR). The SACLANT led Allied Command Atlantic was based at Norfolk, Virginia. The entire command was routinely referred to as 'SACLANT'.
The Military Committee of the European Union (EUMC) is the body of the European Union's (EU) Common Security and Defence Policy that is composed of member states' Chiefs of Defence (CHOD). These national CHODs are regularly represented in the EUMC in Brussels by their permanent Military Representatives (MilRep), who often are two- or three-star flag officers.
The Chair of the NATO Military Committee (CMC) is the head of the NATO Military Committee, which advises the North Atlantic Council (NAC) on military policy and strategy. The CMC is the senior military spokesperson of the 32-nation alliance and principal advisor to the Secretary General. The chair is one of the foremost officials of NATO, next to the Secretary General and the Supreme Allied Commander Europe. The CMC is assisted by the deputy chair, who advises the Deputy Secretary General and serves as the principal agent for coordination of nuclear, biological, and chemical matters for the Military Committee. Originally titled the Chairman, the post was redesignated in 2021 to reflect the gender-neutrality of the post.
The secretary general of NATO is the chief civil servant of the North Atlantic Treaty Organization (NATO), an intergovernmental military alliance with 32 member states. The officeholder is an international diplomat responsible for coordinating the workings of the alliance, leading NATO's international staff, chairing the meetings of the North Atlantic Council and most major committees of the alliance, with the notable exception of the NATO Military Committee, as well as acting as NATO's spokesperson. The secretary general does not have a military command role; political, military and strategic decisions ultimately rest with the member states. Together with the chair of the NATO Military Committee and the supreme allied commander, the officeholder is one of the foremost officials of NATO.
The structure of the North Atlantic Treaty Organization (NATO) is complex and multi-faceted. The decision-making body is the North Atlantic Council (NAC), and the member state representatives also sit on the Defence Policy and Planning Committee (DPPC) and the Nuclear Planning Group (NPG). Below that the Secretary General of NATO directs the civilian International Staff, that is divided into administrative divisions, offices and other organizations. Also responsible to the NAC, DPPC, and NPG are a host of committees that supervise the various NATO logistics and standardisation agencies.
The Western Union (WU), also referred to as the Brussels Treaty Organisation (BTO), was the European military alliance established between France, the United Kingdom (UK) and the three Benelux countries in September 1948 in order to implement the Treaty of Brussels signed in March the same year. Under this treaty the signatories, referred to as the five powers, agreed to collaborate in the defence field as well as in the political, economic and cultural fields.
From April 1948, the member states of the Western Union (WU), decided to create a military agency under the name of the Western Union Defence Organisation (WUDO). WUDO was formally established on September 27–28, 1948.
The Committee of Chiefs of Military Medical Services in NATO (COMEDS) is the North Atlantic Alliance's senior medical body, reporting to the NATO Military Committee. It is headed by a chairman, is composed of the Surgeons General of the allied nations and the senior medical advisers within NATO's command structure, and meets twice annually in plenary session. Supported by NATO's integral medical staff and numerous specialized multi-national working groups and panels, COMEDS acts as the central point for the development and coordination of common standards and for providing medical advice to the Military Committee.
The chairman of the European Union Military Committee (CEUMC) is the four-star rank officer representing and presiding over the European Union's (EU) Military Committee (EUMC), composed of the chiefs of defence (CHODs) of the EU member states. The chairman is selected by the chiefs of defence of the member states and appointed by the members of the Council of the European Union for a three-year term.
The Deputy Chair of the NATO Military Committee (DCMC) is the deputy head of the NATO Military Committee. Originally titled as the Deputy Chairman, the post was redesignated in 2021 to reflect the gender-neutrality of the post.
This article outlines the history of the Common Security and Defence Policy (CSDP) of the European Union (EU), a part of the Common Foreign and Security Policy (CFSP).
The history of the North Atlantic Treaty Organization (NATO) begins in the immediate aftermath of World War II when British diplomacy set the stage to contain the Soviet Union and to stop the expansion of Soviet power in Europe. The United Kingdom and France signed, in 1947, the Treaty of Dunkirk, a defensive pact, which was expanded in 1948 with the Treaty of Brussels to add the three Benelux countries and committed them to collective defense against an armed attack for fifty years. The British worked with Washington to expand the alliance into NATO in 1949, adding the United States and Canada as well as Italy, Portugal, Norway, Denmark, and Iceland. Greece and Turkey joined in 1952, West Germany joined in 1955, Spain joined in 1982, Czech Republic, Hungary and Poland joined in 1999, Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia, and Slovenia joined in 2004, Albania and Croatia joined in 2009, Montenegro joined in 2017, North Macedonia joined in 2020, Finland joined in 2023, and Sweden joined in 2024.
This article outlines the present structure of the European Union's Common Security and Defence Policy (CSDP), a part of the Common Foreign and Security Policy (CFSP) based on articles 42–46 of the Treaty on European Union (TEU). Article 42.2 of TEU states that the CSDP includes the 'progressive framing' of a common Union defence policy, and will lead to a common defence, when the European Council of national heads of state or government, acting unanimously, so decides.
The European Union (EU) and the North Atlantic Treaty Organisation (NATO) are two main treaty-based Western organisations for cooperation between member states, both headquartered in Brussels, Belgium. Their natures are different and they operate in different spheres: NATO is a purely intergovernmental organisation functioning as a military alliance, which serves to implement article 5 of the North Atlantic Treaty on collective territorial defence. The EU on the other hand is a partly supranational and partly intergovernmental sui generis entity akin to a confederation that entails wider economic and political integration. Unlike NATO, the EU pursues a foreign policy in its own right—based on consensus, and member states have equipped it with tools in the field of defence and crisis management; the Common Security and Defence Policy (CSDP) structure.
Philippe Lavigne is a French general. He was the Chief of Staff of the French Air and Space Force from 2018 to 2021 and the Supreme Allied Commander Transformation HQ from 23 September 2021 to 23 September 2024.
