Who were the political leaders for the countries involved in the War of 1812?

Answer 1

King George III was still on the throne of the United Kingdom, where he had been since 1760, including the entire period of the American Revolution. The political head of the government in Great Britain was Robert Banks Jenkinson, Lord Liverpool. Liverpool took office just as America was declaring war and remained Prime Minister until 1827.

Much of the fighting was in Canada, then a British colony. Canada was under a Governor-General, appointed by the government in Britain, who combined civil administration with leadership of the military forces of Britain in Canada. The Governor-General, and Commander-in-Chief of British North America, was Sir George Prevost. At first Prevost concentrated his attention on Lower Canada (today's Quebec), while his assistant, Sir Isaac Brock, handled matters in Upper Canada (today's Ontario). "Upper Canada" is farther up the St. Lawrence River from the sea as compared to "Lower Canada". After Brock was killed at Lundy's Lane, on the Niagara Frontier, Prevost had to divide his attention between Upper and Lower Canada.

The President of the US was James Madison, hand-picked successor to and protege of Thomas Jefferson.