| Became King of the United Kingdom (by way of the act of union with Ireland) in 1801. Acquired the [[Prince-Bishopric of Osnabrück]] in 1803. He lost (early 1801), regained (آوریل ۱۸۰۱), lost again (مه ۱۸۰۳), regained again (Autumn 1805), lost for a third time (early 1806), and regained for a third time (اکتبر ۱۸۱۳) de facto power in Hanover by various occupations and annexations during the [[جنگهای انقلاب فرانسه]] (1801–1813). After the electoral title became defunct, with the dissolution of the Holy Roman Empire in 1806, nonetheless between 1806 and 1814, the dissolution of the Holy Roman Empire was not recognised and George III retained the electoral title until early 1814 when George was proclaimed King of Hanover, a title which was universally recognised during the Congress of Vienna (۱۸۱۴–۱۵).
