The eastern part went to the Ascanian Bernhard as a "younger" Duchy of Saxony. Since the 12th century, the name of Engers has been out of use. Only the term "Engers" has only been used continuously in the titles. For example, the ruler of the younger Duchy of Saxony ("Duke of Saxony, Engers and Westphalia"). With the takeover of Westphalia in 1815, the title "Westphalia and Engers" went to the Prussian King Frederick William III. Pomerania was originally created as a sub-fief of Brandenberg. It was partitioned several times and some portions were annexed by Sweden and Poland. The Margraves of Brandenberg gradually reacquired Pomerania and used the title Duke of Pomerania. This title was added to reflect the annexation of the Kingdom of Hanover which contained the historic Duchy of Lüneburg. Schleswig was a duchy created by the King of Denmark, and eventually the title reverted to the Danish Crown. Holstein was a fief of the Holy Roman Empire that also was inherited by the King of Denmark. After Napoleon's defeat Holstein joined the German Confederation. German nationalist movements within the duchies and a succession dispute to the duchies led to the Second Schleswig War in which the German Confederation led by Austria and Prussia defeated Denmark, forcing its king to renounce the duchies. A disagreement in how to administer them led to the Austro-Prussian War in which Prussia was victorious and annexed both duchies, allowing King William I to add their titles to his grand title. In 1680 the Archbishopric of Magdeburg was converted into a duchy and given to the Margraves of Brandenburg which ruled it in personal union with their other territories including the Kingdom of Prussia. It was briefly annexed by the Kingdom of Westphalia but returned to and annexed by Prussia after Napoleon's defeat. Product of the annexation of Hanover by the Kingdom of Prussia. The Dukes of Cleves-Jülich-Berg inherited the Duchy of Guelders, but they later lost possession of it when the inheritance split despite the Cleves-Jülich-Berg branch of the family being confirmed by Holy Roman Emperor Sigusmund. The Kings of Prussia, heirs to the historic Dukes of Cleves-Jülich-Berg, acquired a portion of Guelders in the Treaty of Utrecht following the War of the Spanish Succession, and its capital was Geldern.