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Bilateral relations From Wikipedia, the free encyclopedia
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[1][2] 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.
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The memberships of the EU and NATO are distinct, and some EU member states are traditionally neutral on defence issues. The EU and NATO have respectively 27 and 32 member states, of which 23 are members of both. Another four NATO members are EU applicants—Albania, Montenegro, North Macedonia, and Turkey—and another one, the United Kingdom, is a former EU member. Iceland and Norway have opted to remain outside of the EU, but do participate in the European Single Market as part of their European Economic Area (EEA) membership. Four non-NATO states are members of the EU: Austria, Cyprus, Ireland, and Malta. Several EU and NATO member states were formerly members of the Warsaw Pact.[3]
The EU has its own mutual defence clause in Articles 42(7) and 222 of the Treaty on European Union (TEU) and the Treaty on the Functioning of the European Union (TFEU), respectively. The CSDP command and control structure is however much smaller than the NATO Command Structure (NCS), and the extent to which the CSDP should evolve to form a full defence arm for the EU that is able to implement the EU mutual defence clause in its own right is a point of contention. The United Kingdom (UK) had objected to this, when it was still an EU member state. At the UK's insistence in the negotiations leading to the Treaty of Lisbon, Article 42.2 of TEU specified that NATO shall be the main forum for the implementation of collective self-defence for EU member states that are also NATO members.
The 2002 Berlin Plus agreement and 2018 Joint Declaration[4] provide for cooperation between the EU and NATO, including that that NCS resources may be used for the conduct of the EU's CSDP missions.
The Western Union, established to implement the 1948 Treaty of Brussels signed by Belgium, France, the Netherlands, Luxembourg, and the United Kingdom, represents a precursor to both NATO and the EU's defence arm, the Common Security and Defence Policy (CSDP). WUDO's organisational chart as of November 1948, in which solid and dashed lines indicate control and liaison lines, respectively:[5]
Consultative Council (foreign or prime ministers) | |||||||||||||||||||||||||||||||||
Permanent Commission (4 ambassadors in London plus Foreign Office representative) | Defence Committee (defence ministers) | ||||||||||||||||||||||||||||||||
Military Supply Board | |||||||||||||||||||||||||||||||||
Chiefs of Staff Committee (WUCOS) | |||||||||||||||||||||||||||||||||
Finance Committee | |||||||||||||||||||||||||||||||||
UN General Assembly Special Committee | Security Committee | Military Committee and Combined Staff of WUCOS | Commanders-in-Chief Committee and its Chairman | ||||||||||||||||||||||||||||||
C-in-C Western Europe Land Forces | C-in-C Western Europe (Tactical) Air Force | Flag Officer Western Europe | |||||||||||||||||||||||||||||||
Since the end of World War II, sovereign European countries have entered into treaties and thereby co-operated and harmonised policies (or pooled sovereignty) in an increasing number of areas, in the European integration project or the construction of Europe (French: la construction européenne). The following timeline outlines the legal inception of the European Union (EU)—the principal framework for this unification. The EU inherited many of its present responsibilities from the European Communities (EC), which were founded in the 1950s in the spirit of the Schuman Declaration.
Had its founding treaty not failed to acquire ratification in the French Parliament in 1954, the European Defence Community would have entailed a pan-European military, divided into national components, and had a common budget, common arms, centralized military procurement, and institutions. The EDC would have had an integral link to NATO, forming an autonomous European pillar in the Atlantic alliance.
Following the establishment of the ESDI and the St. Malo declaration, US Secretary of State Madeleine Albright were among others who voiced concern that an independent European security pillar could undermine NATO, as she put forth the three famous D's:
Our [...] task is working together to develop [the ESDI] within [NATO], which the United States has strongly endorsed. We enthusiastically support any such measures that enhance European capabilities. The United States welcomes a more capable European partner, with modern, flexible military forces capable of putting out fires in Europe's own back yard and working with us through [NATO] to defend our common interests. The key to a successful initiative is to focus on practical military capabilities. Any initiative must avoid preempting [NATO] decision-making by de-linking ESDI from NATO, avoid duplicating existing efforts, and avoid discriminating against non-EU members. [...]
The Berlin Plus agreement enables EU operations to be planned and conducted at the military strategic and operational level with recourse to assets and capabilities in the NATO Command Structure (NCS). In such an event, an Operational Headquarters (OHQ) would be set up within NATO's Supreme Headquarters Allied Powers Europe (SHAPE) in Mons, Belgium. SHAPE is the main headquarters of Allied Command Operations (ACO).
When the NCS provides the OHQ, the Deputy Supreme Allied Commander Europe (DSACEUR) acts as Operation Commander (OpCdr).
The Berlin Plus agreement requires that the use of NATO assets by the EU is subject to a "right of first refusal", i.e. NATO must first decline to intervene in a given crisis,[7][8] and contingent on unanimous approval among NATO states, including those outside of the EU. For example, Turkish reservations about Operation Concordia using NATO assets delayed its deployment by more than five months.[9]
The European External Action Service's (EEAS) Military Staff (EUMS), situated in the Kortenberg building in Brussels, has a permanent NATO liaison team and runs a permanent EU cell at NATO's Supreme Headquarters Allied Powers Europe (SHAPE) in Mons.
The CSDP entails collective self-defence amongst member states. This responsibility is based on Article 42.7 of TEU, which states that this responsibility does not prejudice the specific character of the security and defence policy of certain member states, referring to policies of neutrality. See Neutral country§European Union for discussion on this subject. According to the Article 42.7 "If a Member State is the victim of armed aggression on its territory, the other Member States shall have towards it an obligation of aid and assistance by all the means in their power, in accordance with Article 51 of the United Nations Charter. This shall not prejudice the specific character of the security and defence policy of certain Member States." Article 42.2 furthermore specifies that NATO shall be the main forum for the implementation of collective self-defence for EU member states that are also NATO members.
The EU does not have a permanent military command structure. However it has been agreed that North Atlantic Treaty Organization (NATO) military structures may be used for the conduct of the EU's CSDP missions under the Berlin Plus agreement. The Military Planning and Conduct Capability (MPCC), established in 2017 and to be strengthened in 2020, does however represent the EU's first step in developing a permanent military OHQ. In parallel, the newly established European Defence Fund (EDF) marks the first time the EU budget is used to finance multinational defence projects.
The EU command and control (C2) structure is directed by political bodies composed of member states' representatives, and generally requires unanimous decisions. As of April 2019:[10]
Political strategic level:[5] | |||||||||||||||||||||||||||||||||
ISS | EUCO Pres. (EUCO) | Chain of command | |||||||||||||||||||||||||||||||
Coordination/support | |||||||||||||||||||||||||||||||||
SatCen | CIVCOM | HR/VP (FAC) | |||||||||||||||||||||||||||||||
INTCEN | HR/VP (PMG) | HR/VP (PSC)[6] | ![]() ![]() ![]() ![]() ![]() ![]() CEUMC (EUMC) | ||||||||||||||||||||||||||||||
CMPD | ![]() ![]() ![]() ![]() DGEUMS[3] (EUMS) | ||||||||||||||||||||||||||||||||
Military/civilian strategic level: | |||||||||||||||||||||||||||||||||
![]() ![]() ![]() ![]() Dir MPCC[3] (MPCC) | JSCC | Civ OpCdr CPCC[1] | |||||||||||||||||||||||||||||||
Operational level: | |||||||||||||||||||||||||||||||||
MFCdr[4] (MFHQ) | HoM[1] | ||||||||||||||||||||||||||||||||
Tactical level: | |||||||||||||||||||||||||||||||||
CC[2] Land | CC[2] Air | CC[2] Mar | Other CCs[2] | ||||||||||||||||||||||||||||||
Forces | Forces | Forces | Forces | ||||||||||||||||||||||||||||||
NATO's command structure, under the North Atlantic Council and the NATO Military Committee, is split into Allied Command Operations, responsible for all military operations, and Allied Command Transformation responsible for capability development.
The memberships of the EU and NATO are distinct. The EU and NATO have respectively 27 and 32 member states, of which 23 states are members of both.
The four EU member states which are not members of NATO (Austria, Cyprus, Ireland and Malta) held positions of neutrality during the Cold War, which they have since maintained. However, all but Cyprus are members of NATO's Partnership for Peace. Cyprus is the only EU member state that is neither a full member of NATO nor participates in the Partnership for Peace. Any treaty concerning Cyprus' participation in NATO would likely be blocked by Turkey because of the Cyprus dispute.[11] The 2022 Russian invasion of Ukraine reignited debate surrounding NATO membership in several countries, with Finland and Sweden both joining NATO after decades of neutrality.
Of the 32 NATO member states, 30 are European states. The 7 European states which are NATO members, but not EU members, include four states that have applied for EU membership (Albania, Montenegro, North Macedonia, and Turkey), as well as the United Kingdom which is a former EU member. The two others — Iceland and Norway — have opted to remain outside of the EU, however participate in the EU's single market.
Several EU member states were formerly members of the NATO rival Warsaw Pact.
![]() (in respect of its defence arm, the Common Security and Defence Policy) |
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Mutual defence clause | Article 42.7 of the consolidated version of the Treaty on European Union:
"If a Member State is the victim of armed aggression on its territory, the other Member States shall have towards it an obligation of aid and assistance by all the means in their power, in accordance with Article 51 of the United Nations Charter. This shall not prejudice the specific character of the security and defence policy of certain Member States. [...]" |
Article 5 of the North Atlantic Treaty:
"The Parties agree that an armed attack against one or more of them [on their territory] shall be considered an attack against them all and consequently they agree that, if such an armed attack occurs, each of them, in exercise of the right of individual or collective self-defence recognised by Article 51 of the Charter of the United Nations, will assist the Party or Parties so attacked by taking forthwith, individually and in concert with the other Parties, such action as it deems necessary, including the use of armed force, to restore and maintain the security of the North Atlantic area. [...]" | |
Political strategic organisation | |||
Highest office | High Representative (HR/VP) | Secretary General | |
Principal decision-making body | Foreign Affairs Council | North Atlantic Council | |
Liaison body | European External Action Service | International Staff | |
Seat | Kortenberg building (Brussels, Belgium) | ![]() | |
Military strategic organisation | |||
Supreme commander | ![]() ![]() ![]() ![]() |
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Headquarters | ![]() |
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Chair of chiefs of defence assembly | ![]() ![]() ![]() ![]() ![]() |
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Chiefs of defence assembly | ![]() |
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Advisory body | ![]() |
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Membership | Permanent Structured Cooperation | Membership | |
Member states of both the EU and NATO | |||
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Founder | Founder | Founder |
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2007 | Founder | 2004 |
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2013 | Founder | 2009 |
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2004 | Founder | 1999 |
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1973 | 2023 | Founder |
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2004 | Founder | 2004 |
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1995 | Founder | 2023 |
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Founder | Founder | Founder |
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Founder | Founder | 1955 |
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1981 | Founder | 1952 |
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2004 | Founder | 1999 |
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Founder | Founder | Founder |
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2004 | Founder | 2004 |
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2004 | Founder | 2004 |
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Founder | Founder | Founder |
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Founder | Founder | Founder |
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2004 | Founder | 1999 |
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1986 | Founder | Founder |
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2007 | Founder | 2004 |
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2004 | Founder | 2004 |
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2004 | Founder | 2004 |
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1986 | Founder | 1982 |
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1995 | Founder | 2024 |
Non-NATO EU member states | |||
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1995 | Founder | Partnership for Peace |
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2004 | Founder | No |
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1973 | Founder | Partnership for Peace |
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2004 | No | Partnership for Peace |
Non-EU NATO member states | |||
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Candidate | — | 2009 |
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No | — | Founder |
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Candidate | — | 2017 |
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Candidate | — | 2020 |
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Defence Agency agreement | — | Founder |
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Candidate | — | 1952 |
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No | — | Founder |
European countries outside both the EU and NATO | |||
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No | — | No |
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No | — | Individual Partnership Action Plan |
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No | — | Individual Partnership Action Plan |
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No | — | Partnership for Peace |
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Candidate | — | Membership Action Plan |
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Candidate | — | Intensified Dialogue |
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No | — | Individual Partnership Action Plan |
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Applicant / Potential candidate | — | No |
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No | — | No |
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Candidate | — | Individual Partnership Action Plan |
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No | — | No |
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No | — | Partnership for Peace |
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No | — | No |
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Candidate | — | Individual Partnership Action Plan |
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Defence Agency agreement | — | Partnership for Peace |
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Candidate | — | Intensified Dialogue |
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No | — | No |
NATO member states located in North America, which are therefore ineligible for EU membership | |||
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— | — | Founder |
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— | — | Founder |
Members of NATO's Partnership for Peace located outside Europe, which are therefore neither eligible for EU nor NATO membership | |||
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— | — | Partnership for Peace |
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— | — | Partnership for Peace |
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— | — | Partnership for Peace |
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— | — | Partnership for Peace |
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