NATO faces a worsening security environment defined by Russia’s growing willingness to challenge the West and a Europe whole, free, and at peace. In this new geo-political context the Black Sea region is one of the central friction zones between Russia and NATO. While the Alliance has recently pledged to protect its eastern flank against aggression, overall capacity challenges have resulted in little increased presence in the Black Sea. “A NATO Strategy for Security in the Black Sea Region” takes stock of the security and defense challenges in the broader region and offers operational and policy recommendations for NATO to address security in the Black Sea region.