The impact of the Russo-Ukrainian War on European security dynamics cannot be underestimated. This research provides an extensive analysis of how this war has affected various aspects across eight chapters. It delves into regional dynamics with a special focus on how countries like those in the Baltic region have responded to changing security threats by prioritizing defense measures and promoting cooperation within their region. Additionally, it considers NATO's role in managing security implications generated by this conflict while emphasizing that achieving credible deterrence without unintended ...