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
The next wave of organised Reform activity emerged in the 1830s through the work of William Lyon Mackenzie, James Lesslie, John Rolph, William John O'Grady and Dr Thomas Morrison, all of Toronto. They were critical to introducing the British Political Unions to Upper Canada. Political Unions were not parties. The unions organised petitions to Parliament.