the Nazis divided the population into different groups, each with different rights, food rations, allowed housing strips in the cities, public transportation, etc. In an effort to split the Polish people's identity, they attempted to establish ethnic divisions of Kashubians and Gorals (Goralenvolk), based on these groups' alleged "Germanic component". During the 1930s and 1940s, Jews in Nazi-controlled states were forced to wear something that identified them as Jewish, such as a yellow ribbon or a star of David, and along with Romas (Gypsies), they were subjected to discrimination by the racial laws. Jewish doctors were not allowed to treat Aryan patients and Jewish professors were not permitted to teach Aryan pupils. In addition, Jews were not allowed to use any form of public transportation, besides the ferry, and they were only allowed to shop in Jewish stores from 3–5 pm. After Kristallnacht ("The Night of Broken Glass"), the Jews were fined for the damage which was done by Nazi troops and SS members. Jews, Poles, and Roma were subjected to genocide as "undesirable" racial groups in The Holocaust. The Nazis established ghettos in order to confine Jews and sometimes, they confined Romas in tightly packed areas of the cities of Eastern Europe, turning them into de facto concentration camps. The Warsaw Ghetto was the largest of these ghettos, with 400,000 people. The Łódź Ghetto was the second largest, holding about 160,000. Between 1939 and 1945, at least 1.5 million Polish citizens were transported to the Reich for forced labour (in all, about 12 million forced laborers were employed in the German war economy inside Nazi Germany). Although Nazi Germany also used forced laborers from Western Europe, Poles, along with other Eastern Europeans viewed as racially inferior, were subject to deeper discriminatory measures. They were forced to wear a yellow with purple border and letter "P" (for Polen/Polish) cloth identifying tag sewn to their clothing, subjected to a curfew, and banned from public transportation. While the treatment of factory workers or farm hands often varied depending on the individual employer, Polish laborers, as a rule, were compelled to work longer hours for lower wages than Western Europeans – in many cities, they were forced to live in segregated barracks behind barbed wire. Social relations with Germans outside work were forbidden, and sexual relations (Rassenschande or "racial defilement") were punishable by death. Other cases Canada Racial segregation was widespread and deeply