Wilhelm accepted this title grudgingly on 18 January, having preferred "Emperor of Germany" (German: Kaiser von Deutschland).

However, that would have signaled a territorial sovereignty unacceptable to the South German monarchs, as well as a claim to lands outside his realm (Austria, Switzerland, Luxembourg, etc.).

[8] However, his last chancellor, Prince Max of Baden, knew this was legally impossible, and in order to keep control of the growing revolutionary movement in Berlin, unilaterally announced Wilhelm's abdication of both thrones on 9 November, two days before the Armistice.

"[10] The German Emperors had an extensive list of titles and claims that reflected the geographic expanse and diversity of the lands ruled by the House of Hohenzollern.

His Imperial and Royal Majesty Wilhelm I, By the Grace of God, German Emperor and King of Prussia; Margrave of Brandenburg, Burgrave of Nuremberg, Count of Hohenzollern; sovereign and supreme Duke of Silesia and of the County of Glatz; Grand Duke of the Lower Rhine and of Posen; Duke of Saxony, of Westphalia, of Angria, of Pomerania, Lunenburg, Holstein and Schleswig, of Magdeburg, of Bremen, of Guelders, Cleves, Jülich and Berg, Duke of the Wends and the Kassubes, of Crossen, Lauenburg and Mecklenburg; Landgrave of Hesse and Thuringia; Margrave of Upper and Lower Lusatia; Prince of Orange; Prince of Rügen, of East Friesland, of Paderborn and Pyrmont, of Halberstadt, Münster, Minden, Osnabrück, Hildesheim, of Verden, Cammin, Fulda, Nassau and Moers; Princely Count of Henneberg; Count of Mark, of Ravensberg, of Hohenstein, Tecklenburg and Lingen, of Mansfeld, Sigmaringen and Veringen; Lord of Frankfurt.