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.
Lower Canada Rebellion
The following year, leaders who had escaped across the border into the United States raided Lower Canada in February 1838. Two major armed conflicts occurred when groups of Lower Canadian Patriotes, led by Robert Nelson, crossed the Canada–US border in an attempt to invade Lower Canada and Upper Canada, drive out the British army and establish two independent republics. A second revolt began with the Battle of Beauharnois in November 1838. It was also crushed by forces of the colonial government.