Defence diplomacy in the context of Council of Ministers of Defense of the CIS

The Common Foreign and Security Policy (CFSP) is the organised, agreed foreign policy of the European Union (EU) for mainly security and defence diplomacy and actions. CFSP deals only with a specific part of the EU's external relations, which domains include mainly Trade and Commercial Policy and other areas such as funding to third countries, etc. Decisions require unanimity among member states in the Council of the European Union, but once agreed, certain aspects can be further decided by qualified majority voting. Foreign policy is chaired and represented by the EU's High Representative, currently Kaja Kallas.

The CFSP sees the North Atlantic Treaty Organisation (NATO) as responsible for the territorial defence of Europe and reconciliation. However, since 1999, the European Union is responsible for implementing missions such as peacekeeping and policing of treaties. A phrase often used to describe the relationship between the EU forces and NATO is "separable, but not separate". The same forces and capabilities form the basis of both EU and NATO efforts, but portions can be allocated to the European Union if necessary.

The Common Security and Defence Policy (CSDP) is the European Union's (EU) course of action in the fields of defence and crisis management, and a main component of the EU's Common Foreign and Security Policy (CFSP).

The CSDP involves the deployment of military or civilian missions to preserve peace, prevent conflict and strengthen international security in accordance with the principles of the United Nations Charter. Military missions are carried out by EU forces established with secondments from the member states' armed forces. The CSDP also entails collective self-defence amongst member states as well as a Permanent Structured Cooperation (PESCO) in which 26 of the 27 national armed forces pursue structural integration (the exception being Malta). The CSDP structure – headed by the Union's High Representative (HR/VP), Kaja Kallas, and sometimes referred to as the European Defence Union (EDU) in relation to its prospective development as the EU's defence arm – comprises: