Battle of Cook's Mills
In October 1814 an American army advanced from Fort Erie toward the British line along the Chippawa River. Lieutenant-General Drummond ordered a reconnaissance towards Cook's Mills on his right flank in hopes of finding the Americans vulnerable to attack. On the 19th a heavy skirmish took place, involving men of the Glengarry Light Infantry and the 82nd, 100th and 104th Regiments, supported by a gun and rockets. The British-Canadian force withdrew, but the Americans abandoned Cook's Mills the following day and on the 21st joined the general retreat to Fort Erie.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.