Fort St. Joseph
When the British withdrew from Michilimackinac in 1796 they moved to this island, where they build the most westerly of the British military posts. The troops were accompanied by officers of the Indian Department, who here held councils and distributed presents to Britain's Indian allies. As traders sought the protection of the fort, a small village grew up around it. Here Captain Charles Roberts organized the expedition, which captured Michilimackinac on 17 July 1812. Subsequently Fort St. Joseph was abandoned and in July 1814 it was burned by the Americans.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.