Hitler established a totalitarian police state in Germany from 1933-1939. He eliminated opposition parties, indoctrinated youth through the Hitler Youth, and censored culture. The Nazi propaganda machine spread racial ideology while the Gestapo and SS terrorized citizens and imprisoned Jews, Communists, and others in the first concentration camps. By 1939, Germany had been transformed into a single-party Nazi state based on extreme militarism, racism, and the personal dictatorship of Adolf Hitler.