The subject of the research is the process of legislative provision for creation of sub-divisions that ensure security of European Union states. Providing that security of all EU countries is part of their foreign relations, military units act as such sub-divisions. In his article Kovalev demonstrates that this solution ensures participation of foreign expeditionary forces. He analyzes legislative initiatives and their potential implementation depending on the degree of participation of each member state in global peacekeeping operations. The research method used by the author is the comparative characteristic of the use of national military forces in each EU country as well as forecasting method that defines potential participation of a EU country in international expeditionary activities. The novelty of the research is caused by the fact that for the first time in the academic literature the author analyzes opportunity for legislative provision of building a military block based on European initiative. The