Segregation and isolation
The German invasion of Poland, in September 1939, brought approximately three million Polish Jews under Nazi control. From then on the Nazis decided to segregate the Jews and isolate them from the rest of the population. Jews were driven out of their homes and forced to live in ghettos, small sealed off areas within cities which were surrounded by high walls or barbed wire fences. Life in the ghettos became a fight for survival. Tens of thousands of Jews died of starvations, disease or random killings.