in
Bezirk Bialystok, November 1941 The first anti-Jewish measures were enacted in Germany with the onset of
Nazism; these measures did not include ghettoizing German Jews: such plans were rejected in the post-
Kristallnacht period. However, soon after the
1939 German invasion of Poland, the Nazis began to designate areas of larger Polish cities and towns as exclusively Jewish, and within weeks, embarked on a massive programme of uprooting
Polish Jews from their homes and businesses through
forcible expulsions. Entire Jewish communities were deported into these closed off zones by train from their places of origin systematically, using
Order Police battalions, first in the
Reichsgaue, and then throughout the
Generalgouvernement territory. The Nazis had a special hatred of Polish and other eastern Jews. Nazi ideology depicted Jews, Slavs and Roma as inferior race
Untermenschen ("subhumans") who threatened the purity of Germany's
Aryan Herrenrasse ("master race"), and viewed these people and also political opponents of the Nazi party as parasitic vermin or diseases that endangered the overall health of the
Volksgemeinschaft, the German racial community. German doctors and public health officials helped advance these racist fearmongering ideas. The German
invasion of Poland (1 September 1939) and the formation of Jewish ghettos caused hunger and poverty, crowding and unsanitary conditions, which in turn actually created typhus epidemics in occupied Poland. German physicians and public health officials in the Nazi regime did not acknowledge this; instead, German medical professionals published essays blaming Jewish people's supposed "low cultural level" and "uncleanliness" for the typhoid epidemics. Posters depicting Jews as lice, which transmit from person to person the bacteria that causes epidemic typhus, were publicized, and the respected status of German doctors helped spread the belief that the Jews were responsible for spreading typhus. The German public health officials in occupied Poland were concerned only with the health of German personnel, so they repeatedly urged occupation authorities to isolate Jews further from the rest of the population. German forces regarded the establishment of ghettos as temporary measures, in order to allow higher level Nazis in Berlin to decide how to execute their goal of eradicating Jews from Europe. Nazi officials had an
Endziel, an unarticulated final goal that would take time to reach, and also an
Endlösung, a "final solution" which was a euphemism for the murder of Jews. Toward the Endziel and Endloesung there were intermediate goals to be carried out in the short term, and one of these was to concentrate Jews from the countryside into larger cities, thus making certain areas
Judenrein ("clean of Jews").
The first ghetto of World War II was established on 8 October 1939 at
Piotrków Trybunalski (38 days after the invasion), with the
Tuliszków ghetto established in December 1939. The first large metropolitan ghetto known as the
Łódź Ghetto (
Litzmannstadt) followed them in April 1940, and the
Warsaw Ghetto in October. Most Jewish ghettos were established in 1940 and 1941. Subsequently, many ghettos were sealed from the outside, walled off with brickwork, or enclosed with barbed wire. In the case of sealed ghettos, any Jew caught leaving could be shot. The Warsaw Ghetto, located in the heart of the city, was the largest ghetto in Nazi occupied Europe, with over 400,000 Jews crammed into an area of . The Łódź Ghetto was the second largest, holding about 160,000 people. According to the
United States Holocaust Memorial Museum archives, there were at least 1,000 such ghettos in German-occupied and annexed Poland and the
Soviet Union alone. ==Living conditions==