As the Central and East European states seek to join the European Union and NATO, they face challenging demands to adhere to specific European norms and standards. In this first comprehensive analysis, contributors examine how this process operates in a variety of domains, including civil-military relations; social, labor, and regional relations; economic and information policies; and foreign policy. Each author considers what norms are generated by (or absent from) European international organizations; how they are communicated to prospective members; and, most important, what impact they have had on the policies and actions of individual countries as well as on the region as a whole. These on-the-ground studies provide the empirical foundation needed to support theories of norm diffusion, constructivism, and liberalism in international relations and comparative politics alike.