Engagement of the Serbian Armed Forces personnel and other defence forces outside the borders of the state territory is planned and carried out within the multinational operations of the European Union (EU). This research is partly an analysis and comparison of positive legal provisions and the content of the most important strategic documents defining engagement of these capacities in multinational operations, in order to define the concept of multinational operations and the critical opinion on the legal framework regulating this field, and in the second part it includes a systematic explanation of the importance of engaging the Serbian Armed Forces capacities in the European Union military activities of this kind.