Kaliningrad is surrounded by Lithuania, Poland and The Baltic Sea. If Putin refuses to leave the Crimea, Kaliningrad should at least be isolated or actually invaded. Putin can try invading Lithuania but Lithuania is a NATO protected country and Putin would be crazy to try that. He’s a bold actor and Biden called him a “Killer” but actually fighting NATO which includes 30 nations including America in a crazy gamble for Putin. If Putin decides to fight in Kaliningrad NATO should seize St. Petersburg and the Crimea. Kaliningrad is 86 square miles. Bucks County, Pa. is 611 square miles so the entire country of Kaliningrad in 1/7 the size of Bucks County.