sep 1, 1939 - Germany invaded Poland.

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On September 1, 1939, the German military invaded Poland, initiating World War II. By
October 4, the city of Warsaw had fallen, the entire country had been taken over, and “Poland
had ceased to exist.”22 Living in any part of the occupied region had been dangerous for Polish
Jews, with direct attacks through shootings of Poles by the thousands and a reenactment of the
Kristallnacht23 in every town and city occupied by the Germans

https://cupola.gettysburg.edu/cgi/viewcontent.cgi?article=2007&context=student_scholarship

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