Palmnicken was eventually captured by the Red Army on 7 April 1945 , during the closing days of the war . The northern third of East Prussia , including Palmnicken , became part of the Soviet Union in 1945 under terms of border changes promulgated at the Potsdam Conference . The German population evacuated or was subsequently expelled to western Germany . Palmnicken was renamed Yantarny , derived from '' yantar '' , the Russian word for amber , and was repopulated by Soviet settlers , predominantly Russians , as well as Belarusians , Ukrainians , and Tatars
Potsdam Conference
Potsdam Conference
Yantarny, Kaliningrad Oblast