 They served in the German army and navy and contributed to every field of German business, science and culture.Conditions for German Jews began to change after the appointment of Adolf Hitler (the Austrian-born leader of the National Socialist German Workers' Party) as Chancellor of Germany on 30 January 1933, and the Enabling Act (implemented 23 March 1933) which enabled the assumption of power by Hitler after the Reichstag fire of 27 February 1933.From its inception, Hitler's régime moved quickly to introduce anti-Jewish policies.