George III/I, King of Great Britain and Ireland, King of Saint Helena and the Islands of the Atlantic, King of Van Diemen's Land, was the last king of Great Britain, the first king of Saint Helena and the first king of Van Diemen's Land . His reign saw the gradual demise of the British Empire. First, the Independence of the American colonies, then the independence of New South Wales , the annexation of Canada by the USA, and finally the French invasion and destruction of Britain itself. However, in his reign, he established the Kingdom of Saint Helena. He built strong foundations for the new kingdom to grow and develop into the thriving, vibrant nation it is today.