The Battle of Windsor 1838
Early on December 4, 1838 a force of about 140 American and Canadian supporters of William Lyon MacKenzie crossed the river from Detroit and landed about 1.6 km east of here. After capturing and burning a nearby militia barracks, they took possession of Windsor. In this vicinity they were met and routed by a force of some 130 militiamen commanded by Colonel John Prince. Five of the invaders taken prisoner were executed summarily by order of Colonel Prince. This action caused violent controversy in both Canada and the United States. The remaining captives were tried and sentenced at London, Upper Canada. Six were executed, eighteen transported to a penal colony in Tasmania, and sixteen deported.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.