The Holocaust refers to the Nazi campaign during World War II to exterminate Jews and others deemed inferior. Once in power, the Nazis swiftly implemented racist policies outlined by Hitler, persecuting not only Jews but also the disabled, Roma people, Slavs, homosexuals, and political opponents. Jews were segregated into ghettos and deprived of rights through laws like the Nuremberg Laws. Pogroms like Kristallnacht in 1938 killed many Jews and destroyed Jewish homes and businesses. As persecution increased, some Jews fled but many were unable to escape Nazi-controlled Europe as countries like the United States limited immigration. This ultimately led to the "Final Solution" and establishment of concentration camps for slave labor and