As the Allies advanced on Germany in 1945, the full scope of Nazi atrocities became apparent. Millions of people, especially Jews, had been systematically murdered through policies of removal of rights, ghettoization, mass shootings, and extermination in concentration camps using starvation, overwork, and gas chambers. The Nazi goal, declared in 1941, was the extermination of Jews and other "undesirables" in their quest to create a racially pure society under Hitler's dictatorship.