Germans established at least 1,000 ghettos in Poland and the Soviet Union alone
Most often located in poor neighborhoods that previously housed crowded Jewish populations.
Lodz, area already had 62,000 Jews, gained additional 100,000 Jews when became ghetto. To avoid disruption of the city's transportation, two streets were walled off so trolleys could pass through. Polish passengers rode through the Lodz ghetto while Jews crossed on wooden bridges.
Lodz was the second largest ghetto in Poland. Largest was the Warsaw ghetto more than 400,000 Jews crowded in area of 1.3 square miles
In 1941 One in ten died in Warsaw
Between