The Russia–Ukraine conflict represents one of the most significant security crises of the twenty-first century, exerting profound impacts on the international order and, in particular, on the regional policies of the North Atlantic Treaty Organization (NATO). This war has not only escalated tensions between Russia and the West to unprecedented levels but has also led to a redefinition of NATO’s political and military strategies and objectives. The importance of this issue stems from the fact that Europe is once again witnessing a large-scale war within its borders, compelling NATO to adopt new policies aimed at deterrence and the preservation of internal cohesion.
The central research question is: What are the political and military consequences of the Russia–Ukraine conflict for NATO’s regional policies? The study’s hypothesis suggests that the Ukraine crisis, by creating a shared sense of threat to European security, has strengthened NATO’s political cohesion, reshaped its military posture, and expanded its geographic influence in Eastern Europe.
Research findings indicate that, in response to this crisis, NATO has reinforced its military presence along its eastern borders, deployed new defense systems and equipment, and enhanced intelligence and operational cooperation among its members. Politically, greater unity and convergence have emerged among member states, accelerating the accession processes of new countries such as Finland and Sweden. Overall, the Russia–Ukraine war has driven NATO toward a more active, militarized, and east-oriented strategic posture—a trajectory with lasting implications for the global balance of power and the future of European security.