Royal titles are just the best. Calling someone "Your Grace," "Highness," "Mother of Dragons," or just "Boss" automatically adds to anybody's level of cool.

King George III, who was the nominal leader of Britain at the time of the War of 1812, definitely needed the help. During the war and the peace negotiations he was permanently incapacitated by dementia and psychosis (likely caused by porphyria) to function as a real leader (source). His government was maintained by the prime minister of England, Lord Liverpool.

So why is the British Empire in this text always referred to through the image of the King? In 19th century Europe, the monarchy was a symbol for the entire nation and its people. The King was the country, even if he wasn't making any important decisions.

Is it just us or does that sound kinda like a mascot? In that case, they sure could've found someone cuter than Mad King George.