How European Union makes decisions, translates its mandate into action and fits within the wider international security system.
Shared institutions
The European Council sets broad direction, the Council represents member governments, the Commission advances common policies and the Parliament participates in legislation and oversight. Foreign-policy decisions often require unanimity.
CSDP missions
The Common Security and Defence Policy supports civilian missions, military operations, training and crisis management. The EU is not a collective-defence alliance equivalent to NATO.
Capability development
Permanent Structured Cooperation, the European Defence Agency and the European Defence Fund encourage joint projects, research, procurement coordination and a stronger industrial base.
Rules and sanctions
The single market, trade policy, financial regulation, development assistance and sanctions give the EU substantial strategic influence beyond its military instruments.
Diplomacy and aid
The High Representative and European External Action Service coordinate diplomacy, while member states retain decisive authority over national armed forces and many foreign-policy choices.
Political diversity
Different national interests, unanimity requirements, fragmented procurement and uneven military capacity limit speed. NATO remains central to collective defence for most EU members.