Academy (Führungsakademie der Bundeswehr) Training Centre for Morale & Welfare (Zentrum Innere Führung) Military Counter-intelligence Service (Bundesamt für den Militärischen Abschirmdienst) History 19th century From the Unification of Germany in 1871 until the end of World War I, the German Empire did not have a national Ministry of War. Instead the larger German states (such as the kingdoms of Prussia, Bavaria, Saxony and Württemberg), insisting on their autonomy, each had an own war ministry. According to the military agreements the Prussian minister president Otto von Bismarck had forged with the South German states on the eve of the Franco-Prussian War of 1870/71, the major states were responsible also for the defence of the smaller states. However, the Imperial Navy from 1889 was overseen by a federal department, the Imperial Naval Office. Weimar and Nazi Germany After the war and the German Revolution of 1918–19, the Weimar Constitution provided for a unified, national ministry of defence, which was created largely from the Prussian Ministry of War and the Imperial Naval Office. The Ministry of the Reichswehr was established in October 1919, and had its seat in the Bendlerblock building. In the context of the Treaty of Versailles and the "Law for the Creation of a provisional Reichswehr" of March 1919, the Reichspräsident became the Commander-in-Chief of the armed forces, whilst the Reich Minister of Defence exercised military authority. Only in the Free State of Prussia did military authority remain with the State Minister of War. After the Weimar Constitution came into force, the remaining war ministries in the states of Bavaria, Saxony, Württemberg and Prussia were abolished and military authority was concentrated in the Reich Minister of Defence. Command was exercised respectively by the Chief of the Heeresleitung (Army Command) and the Chief of the Marineleitung (Navy Command, see Reichsmarine). In 1929 a third office was established: the Ministerial Office, whose Chief functioned as the political representative of the Minister. The role of the General Staff was filled by the Truppenamt. The Social Democratic politician Gustav Noske became the first Minister of Defence of Germany. After the Nazi Machtergreifung, when the Reichswehr was recreated as the Wehrmacht in 1935, the ministry was renamed Reichskriegsministerium (Reich Ministry of War); also, the Heeresleitung became the Oberkommando des Heeres (OKH), the Marineleitung became the Oberkommando der Marine (OKM) and the Oberkommando der Luftwaffe (OKL) was newly created. The Ministeramt (Ministerial Office) was renamed the