Security (in a broad sense, see infra, II.B) in Europe is the realm of several regional international organisations, mainly the European Union (“EU”), Western European Union (“WEU”), North Atlantic Treaty Organization (“NATO”), the Organization for Security and Co-operation in Europe (“OSCE”) and, to a lesser extent, the Council of Europe, creating a patchwork of regional security institutions that is unique in the world. These organisations interact in many ways and claim to be mutually reinforcing. Is that the case? Is there room for improvement?