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
On November 15, Mackenzie published his draft constitution. On November 27, Mackenzie printed a handbill declaring "Independence!". On November 29, Mackenzie set the date for the Constitutional Convention for December 21, exactly 6 months after the date of King William's death - the Tory dominated elected assembly, which refused to prorogue, would at that time become illegitimate.