the EU partners with the North Atlantic Treaty Organization (NATO); NATO is an alliance of 32 countries from North America and Europe; its role is to safeguard the security of its member countries by political and military means; NATO conducts crisis management and peacekeeping missions; member countries that participate in the military aspect of the Alliance contribute forces and equipment, which remain under national command and control until a time when they are required by NATO for a specific purpose (i.e., conflict or crisis, peacekeeping); NATO, however, does possess some common capabilities owned and operated by the Alliance, such as some early warning radar aircraft; relations between NATO and the EU were institutionalized in the early 2000s, building on steps taken during the 1990s to promote greater European responsibility in defense matters; cooperation and coordination covers a broad array of issues, including crisis management, defense and political consultations, civil preparedness, capacity building, military capabilities, maritime security, planning, cyber defense, countering hybrid threats, information sharing, logistics, defense industry, counterterrorism, etc.; since Russia’s invasion of Ukraine in February 2022, the EU and NATO have intensified their work and cooperation; NATO and the EU have 23 member countries in common

there are no permanent standing EU forces, but Europe has a variety of multinational military organizations that may be deployed through the EU, in a NATO environment, upon the mandate of the participating countries, or upon the mandate of other international organizations, such as the UN or OSCE including:

the EU Rapid Deployment Capacity (EU RDC) was declared operational in May 2025; the RDC's purpose is to enable the EU to respond to different crisis scenarios by providing a flexible and scalable military instrument of up to 5,000 troops that can be deployed in a swift manner; missions could include capacity building, conflict prevention, humanitarian assistance and disaster relief, rescue and evacuation, or stabilization; the use of the RDC is subject to a unanimous decision by the EU Member States

EU Battlegroups (BGs) are rapid reaction multinational army units that form a key part of the EU's capacity to respond to crises and conflicts; their deployment is subject to a unanimous decision by the European Council; BGs typically consists of 1,500-2,000 troops organized around an infantry battalion depending on the mission; the troops and equipment are drawn from EU member states and under the direction of a lead nation; two BGs are always on standby for a period of six months; the BGs were declared operational in 2007 but have never been used operationally due to political and financial obstacles

the European Corps (Eurocorps) is an independent multinational land force corps headquarters composed of personnel from six framework nations and five associated nations; the corps has no standing operational units; during a crisis, units would be drawn from participating states, and the corps would be placed at the service of the EU and NATO; Eurocorps was established in 1992 by France and Germany; Belgium (1993), Spain (1994), and Luxembourg (1996) joined over the next few years; Poland joined in 2022; Greece and Turkey (since 2002), Italy, Romania, and Austria (since 2009, 2016, and 2021 respectively) participate as associated nations; Eurocorps is headquartered in France

the European Gendarmerie Force (EURGENDFOR) is an operational, pre-organized, and rapidly deployable European gendarmerie/police force; it is not established at the EU level, but is capable of performing police tasks, including law enforcement, stability operations, and training in support of the EU, the UN, OSCE, NATO, and other international organizations or ad hoc coalitions; member state gendarmeries include those of France, Italy, the Netherlands, Poland, Portugal, Romania, and Spain; the Lithuanian Public Security Service is a partner, while Turkey's Gendarmerie is an observer force

the European Medical Corps (EMC) was set up in the aftermath of the Ebola crisis in West Africa in 2014 to enable the deployment of teams and equipment from EU member states to provide medical assistance and public health expertise in response to emergencies inside and outside the EU; 12 European states have committed teams and equipment to the EMC

the European Medical Command (EMC) was formed to provide a standing EU medical capability, increase medical operational readiness, and improve interoperability amongst the participating EU members; it operates closely with the NATO Framework Nations Concept’s Multinational Medical Coordination Center (MMCC) under a single administrative and infrastructural framework (MMCC/EMC); the EMC was declared operational in May 2022

the European Air Transport Command (EATC) is a single multinational command for more than 150 military air mobility assets from seven member states, including transport, air-to-air refueling, and aeromedical evacuation; the EATC headquarters is located in the Netherlands, but the air assets remain located at member national air bases; the EATC was established in 2010

the European Air Group (EAG) is an independent organization formed by the air forces of its seven member nations (Belgium, France, Germany, Italy, Netherlands, Spain, and the UK) that is focused on improving interoperability between the air forces of EAG members and its 14 partner and associate nations; it was established in the late 1990s and is headquartered in the UK

the European Maritime Force (EUROMARFOR or EMF) is a four-nation (France, Italy, Portugal, and Spain), non-standing naval force with the ability to carry out naval, air, and amphibious operations; EUROMARFOR was formed in 1995 to conduct missions such as crisis response, humanitarian missions, peacekeeping, peace enforcement, and sea control; it can deploy under EU, NATO, or UN mandate, but also as long as the four partner nations agree

the Combined Joint Expeditionary Force (CJEF) is a deployable, combined France-UK military force of up to 10,000 personnel for use in a wide range of crisis scenarios, up to and including high intensity combat operations; the CJEF has no standing forces but would be available at short notice for French-UK bilateral, NATO, EU, UN, or other operations; it was established in 2010 and declared operational in 2020

the 1st German/Netherlands (Dutch) Corps is a combined army corps headquarters that has the ability to conduct operations under the command and control of Germany and the Netherlands, NATO, or the EU; in peacetime, approximately 1,100 Dutch and German soldiers are assigned, but during a crisis up to 80,000 troops may be assigned; it was formed in 1995 and is headquartered in Germany

the Lithuanian-Polish-Ukrainian Brigade (LITPOLUKRBRIG) is comprised of an international staff, three battalions, and specialized units; units affiliated with the multinational brigade remain within the structures of the armed forces of their respective countries until the brigade is activated for participation in an international operation; it was formed in 2014 and is headquartered in Poland (2025)

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