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.
Parliament of Upper Canada
Following the Rebellions of 1837 and Lord Durham's 1839 Report to the British Government, Upper Canada and Lower Canada were rejoined in 1841 to create the Province of Canada. The Parliament of Upper Canada was therewith replaced by the newly created Parliament of the United Province of Canada.