The result of the failure of the conference was that many of the Jews had no escape and so were ultimately subject to what was known as Hitler's "Final Solution to the Jewish Question". Two months after Évian, in September 1938, Britain and France granted Hitler the right to occupy the Sudetenland of Czechoslovakia. In November 1938, on Kristallnacht, a massive pogrom across the Third Reich was accompanied by the destruction of over 1,000 synagogues, massacres and the mass arrests of tens of thousands of Jews. In March 1939, Hitler occupied more of Czechoslovakia, causing a further 180,000 Jews to fall under Axis control, while in May 1939 the British issued the White Paper which barred Jews from entering Palestine or buying land there. Following their occupation of Poland in late 1939 and invasion of Soviet Union in 1941, the Germans embarked on a program of systematically killing all Jews in Europe.