Abstract
This study systematizes and analyzes the legal aspects of changes in the deployment of international peacekeeping forces over the past 50 years. The article deals with topical political and legal problems facing the peacekeeping activities of the United Nations (UN) and regional international organizations. These problems emanate from both natural institutional and artificially created factors. Overcoming the challenges ahead is possible only through the development of multilateral diplomacy, the aim of which is to achieve long-term and realizable agreements to resolve conflicts and establish lasting and sustainable peace. The study analyzes the role, effect, and potential of peacekeeping operations under the auspices of the UN and other regional international organizations to ensure international security as a timely response to legal and institutional challenges related to the interests of certain players in the world arena, where Russia and some countries in Europe and Asia have been affected.