Russia's war of aggression against Ukraine has fundamentally shaken Europe's thinking on security policy. Certainties about peace, diplomacy, and cooperation that had been taken for granted for decades are now being called into question. Kherson is at the forefront of Europe's struggle for freedom, security, and self-determination. The experiences of the people there — under occupation, in resistance, and in reconstruction — are not only a warning but also a lesson. What does security mean today in the face of military threats and hybrid attacks? Answering this question is not only about external defense, but also about protecting internal security: from critical infrastructure and public order to social cohesion. Security has long been a task for society as a whole—and resilience is, for good reason, the new guiding principle of governmental action.