Blockhouses first appeared in Canada in Acadia around 1750 during the British conquest. Built in 1781, the Lacolle River blockhouse formed part of the colony’s defence network and served as an outpost for British soldiers on missions in the Upper-Richelieu region. It was abandoned after a peace treaty was signed on December 24, 1814, by the United States and Great Britain, and it is today the only blockhouse still remaining in Québec. The term “blockhouse,” derived from the German “blockhaus,” means a house that blocks the way, and such structures served primarily as rapid defences for strategic sites. This wooden building has two stories, with a corbelled second floor, walls pierced with musket loops, and upper-floor embrasures for cannons, but its wood construction also left it highly vulnerable to fire and poorly resistant to artillery attacks.
