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.
William Lyon Mackenzie
On November 24, Mackenzie travelled north of Toronto to rally supporters. (There is no indication that this was coordinated with the outbreak of the Lower Canada Rebellion earlier in November.) At a meeting on December 2 in Stoufferville, Mackenzie set forth his plan for rebellion in greatest detail: British troops occupied in Lower Canada would be unable to do anything as Reformers from the country marched on Toronto; once there they would join up with Rolph, Morrison, and important men such as Peter Robinson, George Herchmer Markland, and John Henry Dunn (who were not Reformers, but who had resigned from the Executive Council in protest of Lord John Russell's Ten Resolutions). Mackenzie felt that given an armed demonstration, the Tories would be overwhelmed and there would be no need to actually use violence. Instead, Lieutenant Governor Head could be seized and the reserve lands could be used to compensate everyone who marched on Toronto with of land. The rebels were instructed to assemble at John Montgomery's tavern on Yonge Street on December 7, and then march into Toronto together. On December 1, Mackenzie wrote a declaration of independence which was to be distributed to rebels immediately before the march on Toronto. On Sunday, December 3, Mackenzie returned to Toronto, where he learned that John Rolph, having heard a false rumour that the government was preparing to mount a defence, had sent a message to Samuel Lount, instructing him to raise several hundred men and enter Toronto the next day. Mackenzie attempted to stop this action, but he could not reach Lount in time, and thus the Upper Canada Rebellion began ahead of Mackenzie's planned schedule, on December 4.