Mordechai Anielewicz, also known as ŻOB, during the Warsaw Ghetto Uprising. Born to a poor family in Wyszków near Warsaw, he joined and became a leader of the Zionist-socialist youth movement "Hashomer Hatzair" after he completed his high school studies. On September 7, 1939, a week after the German invasion of Poland, Anielewicz escaped with his members of the group from Warsaw to the eastern regions in the hopes that the Polish would slow down the German advance. Wikipedia
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