the article analyzes the contribution of the Yalta conference of 1945 to the formation of the modern international legal system. We believe that the role the decisions taken at this conference played in the formation of current international law is significantly underestimated these days. The purpose of this article was to identify the elements of modern international law the formation and development of which were influenced by the Yalta Conference. For this, the following objectives were set

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... nd consistently accomplished in the course of research: to determine the role of international conferences as mechanisms for the development of international law; to identify the features of the Yalta conference; to study international legal decisions that were made during the Yalta conference. Methods: we applied general scientific methods of analysis, synthesis, interpretation, formal logic. In connection with the study of historical aspects of international legal science, the method of historical and legal analysis played a significant role. Of the specialized legal methodological tools used in the preparation of the article, we note the methods of formal legal analysis and legal modeling. Results: the article proves that the Yalta conference laid the legal foundations for new significant international legal regulations. We consider the following to be the main international legal achievements of Yalta-1945: final agreement on the creation of the UN; the creation of a completely new mechanism of international legal governance – the UN Security Council; participation in the formation of a new system of sources of international law; participation in the development of the basis of new international law; participation in the formation of a number of new branches of international law. Conclusions: the Yalta Conference marks the end of one era and the beginning of a new one, in which the UN will occupy the most important place in the system of management of international legal relations. Many decisions made in Yalta concerned the future of the international legal order, and not just the resolution of the geopolitical issues of the Second World War at its last stage.