 Hanover formed the Guelph Party (or German Party) to continue political appeals against the Prussian and German annexations of the crown.After the peace ending the Napoleonic wars reshaped Europe, ushering in the Modern era, the Electorate of Hanover (duchy of Brunswick and Lüneburg, held in personal union by the king of Great Britain, George III) was dissolved by treaty.Its lands were enlarged and the state was promoted to a kingdom.