For some time now, an issue of the Europeanization has been quite deeply explored in literature on political science. Numerous authors take on that subject in a variety of contexts, which means that it is a problem that is very interesting from a scientifi c point of view. Th ere are plenty of Polish scientists researching this area, as well as a great number of foreign publications. An interest of Europeanization’s processes is most often investigated in the context of public politics. In this article, by the use of a nomological – deductive approach, the author endeavors to make an explanation of the term Europeanization and also to show to what extend and how the Europeanization of Polish armed forces succeeded in the context of their participation in missions lead by the European Union.