Battle of Lundy's Lane
This was the site of the bloodiest battle of the War of 1812. On the afternoon of 25th July, 1814, Lieutenant-General Gordon Drummond with about 2800 men engaged the invading American army which had recently been victorious at Chippawa. The armies were evenly matched and the six-hour battle lasted until darkness and heavy losses put an end to the fighting. Each force had lost over 800 men. Although each claimed victory, the Americans had failed to dislodge Drummond from his position. They withdrew the next day, ending their offensive in Upper Canada.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.