George III most certainly did not set foot in the new world. He didn't even visit his Duchy (later Kingdom) of Hanover, despite the fact that his Grandfather (George II) and Great-Grandfather (George I) were born there and visited. The first reigning British monarch to visit the new world was George VI, father of Elizabeth II. read more
George VI (father of the current Queen) visited Canada and the US, and I believe he was the first reigning monarch to set foot in the Americas. He did so shortly before the start of World War II."Hyde Park on the Hudson," a movie about the visit to the US, comes out in December 2012. read more
England’s longest-ruling monarch before Queen Victoria, King George III (1738-1820) ascended the British throne in 1760. During his 59-year reign, he pushed through a British victory in the Seven Years’ War, led England’s successful resistance to Revolutionary and Napoleonic France, and presided over the loss of the American Revolution. read more
In 1786 George III was clumsily attacked with a knife. In 1794 a bolt passed right through the King's carriage. In 1800 five shots ware fired during a review of the Grenadier Guards, but they too missed the King. The same evening another man fired at George III, when he entered the Royal box in the theatre. read more