The paper talks about the need to establish a European army in the context of European security. Namely, during the last century, two world wars took place that had catastrophic consequences for Europe and were followed by the period of the Cold War. Faced with enormous infrastructural and economic damage, Europe was aware that concrete measures should be taken to preserve peace in the future, and it saw the achievement of this goal through European integration. Considering the end of the war, the first direction was the establishment of a common army and defense organization, but considering the still fresh wounds of the Second World War, the European Defense Organization never came to life in the full sense, but its role was taken over by the Western European Union in the shadow, and the full role of defense The NATO alliance, and the signatory countries of the Brussels Pact continued with further European integration through political and economic alliances. The change in the security situation in Europe in the 21st century and the instability on the part of the USA within the NATO alliance raises the question of whether the EU should establish a common European army.