Sea denial in the Black Sea: Lessons for Europe

Sea denial in the Black Sea: Lessons for Europe Ukraine turned maritime vulnerability into a strategic advantage in the Black Sea. Europe must now turn those wartime lessons into lasting maritime security. At the start of Russia’s full-scale invasion, the naval balance looked overwhelmingly one-sided. Russia seized Snake Island, blockaded Ukrainian ports, and threatened both amphibious operations and Ukraine’s access to global maritime trade. Yet the most consequential outcome of the war at sea is that Russia failed to convert naval superiority into lasting control of the north-western Black Sea. Despite lacking a modern fleet, Ukraine denied Russian freedom of action, reopened maritime exports, and pushed the Black Sea Fleet into a more defensive posture.