T he history of the European Union (EU) represents an intriguing security paradox. European integration was born out of the destruction of World War II. Its main rationale was to prevent the recurrence of conflict and devastation in Western Europe, although such objectives were never explicitly stated. Throughout the period of the cold war, regional integration unfolded as an evolutionary process of expansion across an increasing number of issue areas and participating countries. It suc cessfully performed security functions without a formally defined security purpose. The true success of European integration was measured in economic growth, social welfare, and posi tive security dynamics among former adver saries in the regional system. The geopolitical position of Western Europe was significantly reinforced. During the post-cold war era, under condi tions of decreased direct military threats, the European Union (EU)2 for the first time formu lated a security interest, developed decision making procedures, and created an institutional ized security domain. It continued to increase its stake in European security by extending an area of freedom, security, and justice in Europe.3 The continued consolidation of the security position of the union throughout the 1990s was closely related to the historic reunification of the Euro pean continent and the democratization of East ern Europe. By 1996, ten Central and East Euro pean countries (CEECs) had applied for EU membership. Enlargement to the east became the true modus operandi of integration-a meeting place of its goals for institutional expansion, the democratic transformation of Eastern Europe, and the stabilization of the entire regional sys tem. The eastward enlargement has been a com plex multidimensional process comprised of three elements: (1) accession of the countries from Central and Eastern Europe (now com plete) and continued geographic expansion; (2) long-term integration strategy toward the West ern Balkans; and (3) gradual development of a European Neighborhood Policy contributing to the democratization, openness, and political sta bilization of countries in the periphery of the Wider Europe. 4 Academic and public policy research has sought intuitively to elucidate the security implications of European integration. There is a consensus in the literature that the European Union is a nontraditional security actor. A num ber of authors regard it as the most important security institution in Europe. The EU has its own identity features, these authors argue. It attracts countries from the periphery. It partici pates in security creation for the whole of Europe, both independently and jointly with NATO and the Organization for Security and Cooperation in Europe (OSCE). Security, there fore, has become indivisible from the EU's inte grative dynamics.5 The security role of the union develops at three levels: an institutional ized security domain, the Common Foreign and Security Policy (CFSP); an external anchor for the periphery; and direct military capacity.6 According to Anders Bjurner, EU enlargement should be regarded as perhaps the most impor tant security-producing process taking place in Europe today.7 At the same time, a variety of studies contend that the EU is not a meaningful security actor as, historically, security has been only an implicit integration objective and remains underdeveloped. The union continues to depend Boyka Stefanova is an assistant professor in the Department of Political Science at the Univer sity of Texas at San Antonio, where she specializes in compar ative and European politics and democratic transitions.