Globalization has changed how we think about time, space and distance, but geography is still the same where it counts: national security. The former Soviet states lining Russia's border know this better than most, since their proximity to the eastern giant renders them more vulnerable to Moscow's hybrid warfare tactics than countries farther afield. Nations like Ukraine, Georgia and Moldova sit on the front line of Russia's lasting battle with the West for influence in the international system, and they are the countries most at risk of being caught in the crossfire....