The Holocaust was a genocide carried out by Nazi Germany against European Jews during World War II. Hitler rose to power in Germany and established a totalitarian regime. He implemented racist policies and propaganda targeting Jews. Concentration camps were established where Jews and others were imprisoned and exterminated. Extermination camps like Auschwitz were built for systematic mass killings using gas chambers. Despite overwhelming odds, some resisted like the Warsaw Ghetto Uprising and the White Rose resistance group in Germany. The Holocaust ended as Allied forces liberated camps in 1945.