The ghetto inhabitants – most of whom were killed during Operation Reinhard – possessed Polish citizenship before the Nazi – Soviet invasion of Poland , which in turn enabled over 150,000 Holocaust survivors registered at CKŻP to take advantage of the later repatriation agreements between the governments of Poland and the Soviet Union , and legally emigrate to the West to help form the nascent State of Israel . Poland was the only Eastern Bloc country to allow free Jewish aliyah without visas or exit permits upon the conclusion of World War II . By contrast , Stalin forcibly brought Soviet Jews back to USSR along with all Soviet citizens , as agreed to in the Yalta Conference
Yalta Conference
Yalta Conference
Jewish ghettos in German-occupied Poland