The U.S. declares war on Britain (June 18 1812), beginning the War of 1812. Americans under General William Hull invade Canada from Detroit (July 11 1812) Canadians are victorious at the Battle of Queenston Heights (Oct. 13 1812)
Americans burn York (Apr. 27 1813)
After several years of harassment by agents of the North West Company, Métis and Indians under Cuthbert Grant kill Robert Semple, governor of the Red River settlement (June 19 1816).
(1821-4)The Lachine Canal is completed.
(1834) York is renamed Toronto.
(1834-35) William Lyon Mackenzie becomes the first mayor of Toronto.