Poland’s reaction to the proclamation in 1999 by the European Union – the European Security and Defence Policy (ESDP), was restrained, and even critical. However, after the accession to the community, the authorities of Poland have started engaging in shaping and carrying out this policy. Poland is participating in building assets and capabilities of ESDP: in the process of European rapid reaction forces generation, in creation of “battle groups”, in work of the European Defence Agency, and in building of ESDP civilian capabilities. It is engaging in the EU crisis management operations,military and civilian missions. During last years Poland is showing high activity in favour to strengthening the Common Security and Defence Policy (new name of ESDP after Lisbon Treaty); it gave the evidence of that at the time of the Presidency of the EU Council in the second half of 2011. In matters of strengthening the CSDP Poland cooperates closely with Germany and France within the framework of the Weimar Triangle.