Lower Canada Rebellion
When news of the arrest of the Patriote leaders reached Upper Canada, William Lyon Mackenzie launched an armed rebellion in December 1837. In the meantime, filibusters from the United States, the Hunter Patriots, formed a small militia and attacked Windsor, Upper Canada, to support the Canadian Patriots. This resulted in the declaration of martial law by the Lower Canadian government.
Upper Canada Rebellion
The Upper Canada Rebellion was an insurrection against the oligarchic government of the British colony of Upper Canada (present-day Ontario) in December 1837. While public grievances had existed for years, it was the rebellion in Lower Canada (present-day Quebec) that emboldened rebels in Upper Canada to openly revolt soon after.