Less than a year before the outbreak of war , on 1 October 1938 , the German Army rolled into the Sudetenland in accordance with the Munich Agreement . The operation was completed by 10 October . Two weeks later , on 24 October 1938 , Ribbentrop summoned Polish ambassador to Berchtesgaden and presented him with Hitler 's '' Gesamtlösung '' regarding the Polish Corridor and the Free City of Danzig . Ambassador Lipski refused . Three days later , the first mass deportation of Polish nationals from Nazi Germany began . It was the eviction of Jews who settled in Germany with Polish passports . On 9 – 10 November 1938 , the '' Kristallnacht '' attack was carried out by the SA paramilitary forces ; thousands of Jews holding Polish citizenship were rounded up and sent via rail to the Polish border and to the Nazi concentration camps . The round-up included 2,000 ethnic Poles living and working there
Kristallnacht
Kristallnacht
Nazi crimes against the Polish nation