What was the name of the 1837 rebellion in Upper Canada?

The 1837 rebellion in Upper Canada was called the Upper Canada Rebellion.

It was an armed insurrection against the oligarchic colonial government of Upper Canada, a territory corresponding broadly to present-day Ontario. Reformers objected to the power of the Family Compact, a small group of officials and elites who dominated government and resisted demands for representative and responsible government.

The rebellion began in December 1837 around Toronto, where William Lyon Mackenzie became its best-known leader. Government forces quickly defeated the main uprising, but unrest and cross-border raids continued into 1838. Some rebels received support from the United States, and Mackenzie briefly proclaimed a Republic of Canada on Navy Island in the Niagara River.

The Upper Canada Rebellion occurred alongside the Lower Canada Rebellion in present-day Quebec. Together, they are known as the Rebellions of 1837–1838. Their aftermath led to Lord Durham’s report, the union of Upper and Lower Canada in 1840, and eventually the development of responsible government.