President of Germany
Friedrich Ebert (SPD) served as Germany's first president, followed by Paul von Hindenburg. The office effectively came to an end upon Hindenburg's death in 1934 and its powers merged with those of chancellor. Adolf Hitler now ruled Germany as "Führer und Reichskanzler", combining his previous positions in party and government. The office, however, was not abolished and briefly revived at the end of the Second World War when Hitler appointed Grand Admiral Karl Dönitz as his successor as President of Germany. Dönitz agreed to the surrender to the Allies and was arrested a few days later.
Weimar Republic
Germany became a "de facto" republic on 9 November 1918 when Kaiser Wilhelm II abdicated the German and Prussian thrones with no agreement made on a succession by his son Crown Prince Wilhelm, and became a "de jure" republic in February 1919 when the position of President of Germany was created. A national assembly was convened in Weimar, where a new constitution for Germany was written and adopted on 11 August 1919. In its fourteen years, the Weimar Republic faced numerous problems, including hyperinflation, political extremism (with paramilitaries—both left- and right-wing) as well as contentious relationships with the victors of the First World War. Resentment in Germany towards the Treaty of Versailles was strong especially on the political right where there was great anger towards those who had signed the Treaty and submitted to fulfill the terms of it. The Weimar Republic fulfilled most of the requirements of the Treaty of Versailles although it never completely met its disarmament requirements and eventually paid only a small portion of the war reparations (by twice restructuring its debt through the Dawes Plan and the Young Plan). Under the Locarno Treaties, Germany accepted the western borders of the country by abandoning irredentist claims on France and Belgium, but continued to dispute the eastern borders and sought to persuade German-speaking Austria to join Germany as one of Germany's states.