 After Napoleon was defeated in 1814, most of it became part of the United Kingdom of the Netherlands, with the part on the east side of the rivers Our and Sauer becoming part of Prussia (now Germany).At the Congress of Vienna in 1815 some of the land of the former Duchy of Luxemburg was given to Prussia to satisfy a dynastic claim and the remainder was created as a new Grand Duchy of Luxemburg which also became a member of the German Confederation and given to King William I of the Netherlands in a personal union with the United Kingdom of the Netherlands.Unlike the Netherlands, however, Luxembourg was part of the German Confederation established in 1815, and a garrison of the Kingdom of Prussia was stationed there.