Template:Participation in Euro-Atlantic defence arrangements

  Non-European countries
  Transcontinental countries
Comparison of the two main Euro-Atlantic defence organisations
   European Union
(in respect of its defence arm, the Common Security and Defence Policy)
 NATO
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) NATO headquarters (Brussels, Belgium)
  Military strategic organisation
Supreme commander Director of the Military Planning and Conduct Capability Supreme Allied Commander Europe
Headquarters Military Planning and Conduct Capability (Brussels, Belgium) Supreme Headquarters Allied Powers Europe (Mons, Belgium)
Chair of chiefs of defence assembly Chairman of the European Union Military Committee Chair of the NATO Military Committee
Chiefs of defence assembly European Union Military Committee NATO Military Committee
Advisory body European Union Military Staff International Military Staff
  Membership Permanent Structured Cooperation Membership
Member states of both the EU and NATO
 Belgium Founder Founder Founder
 Bulgaria 2007 Founder 2004
 Croatia 2013 Founder 2009
 Czech Republic 2004 Founder 1999
 Denmark 1973 2023 Founder
 Estonia 2004 Founder 2004
 Finland 1995 Founder 2023
 France Founder Founder Founder
 Germany Founder Founder 1955
 Greece 1981 Founder 1952
 Hungary 2004 Founder 1999
 Italy Founder Founder Founder
 Latvia 2004 Founder 2004
 Lithuania 2004 Founder 2004
 Luxembourg Founder Founder Founder
 Netherlands Founder Founder Founder
 Poland 2004 Founder 1999
 Portugal 1986 Founder Founder
 Romania 2007 Founder 2004
 Slovakia 2004 Founder 2004
 Slovenia 2004 Founder 2004
 Spain 1986 Founder 1982
 Sweden 1995 Founder 2024
Non-NATO EU member states
 Austria 1995 Founder Partnership for Peace
 Cyprus  2004 Founder No
 Ireland 1973 Founder Partnership for Peace
 Malta 2004 No Partnership for Peace
Non-EU NATO member states
 Albania Candidate 2009
 Iceland No Founder
 Montenegro Candidate 2017
 North Macedonia Candidate 2020
 Norway Defence Agency agreement Founder
 Turkey  Candidate 1952
 United Kingdom No Founder
European countries outside both the EU and NATO
 Andorra  No No
 Armenia  No Individual Partnership Action Plan
 Azerbaijan  No Individual Partnership Action Plan
 Belarus No Partnership for Peace
 Bosnia and Herzegovina Candidate Membership Action Plan
 Georgia  Candidate Intensified Dialogue
 Kazakhstan  No Individual Partnership Action Plan
 Kosovo Applicant / Potential candidate No
 Liechtenstein  No No
 Moldova Candidate Individual Partnership Action Plan
 Monaco  No No
 Russia  No Partnership for Peace
 San Marino  No No
 Serbia Candidate Individual Partnership Action Plan
  Switzerland Defence Agency agreement Partnership for Peace
 Ukraine Candidate Intensified Dialogue
 Vatican City  No No
NATO member states located in North America, which are therefore ineligible for EU membership
 Canada Founder
 United States Founder
Members of NATO's Partnership for Peace located outside Europe, which are therefore neither eligible for EU nor NATO membership
 Kyrgyzstan Partnership for Peace
 Tajikistan Partnership for Peace
 Turkmenistan Partnership for Peace
 Uzbekistan Partnership for Peace