Forsyth's Raid 1813
On the night of February 6-7, 1813, Major Benjamin Forsyth of the United States Army, with a detachment of regulars and militia numbering about 200 men, crossed the frozen St. Lawrence River from Morristown, N.Y. and attacked Brockville. The village was garrisoned by a company of Leeds Militia who, taken by surprise, could offer no resistance. The invaders released prisoners from the jail, took a quantity of arms, horses and cattle, and carried off a number of residents. The resentment aroused by this raid led to the successful British attack on Ogdensburg, N.Y., February 22, 1813.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.