Gleichaltung: Nazis had control of every part of life in Germany, e.g., trade unions were banned, workers had to be part of a Nazi union, and young boys were forced to join the Hitler Youth
The SS were Hitler's private bodyguards that evolved into his police force, led by Himmler, dealing with opposition to the Nazis in a violent and brutal manner
The Gestapo, part of the SS under Himmler but led by Heydrich, had the power to arrest people without trial and sent political opponents and Jews to concentration camps
The Legal System under Hitler's control used the People's Court to put 'enemies' of the Nazis on trial, enabling Hitler to make all laws and his party to escape consequences