The Naval battle pitted British Captain George Downie's 93 gun flotilla against Macdonough's 86 gun squadron. The battle was intense, and raged for two hours. Using difficult techniques involving anchor maneuvers Macdonough was able to claim victory, and secure a British surrender. The fighting had also claimed the life of British Captain Downie. By winning the fight on the lake, the American supply line maintained secure, insuring the land forces couldn't be starved out at the heights.
Meanwhile, Prevost launched his assault across the river, after a slight delay. This proved problematic, as the assault was suppose to occur simultaneous to the Naval battle. Prevost planned a two pronged attack, with a feint attack across the bridge, while his main force crossed at Pike's Ford to make an assault on the American left flank. While the feint attack was easily repelled, he managed to get a brigade of his main force across the river. Despite this gain, Prevost called off the attack when he learned of the defeat on the lake. With the American squadron still at large, a victory on land would be pointless. With this defeat, the British ended their campaign in the northern states, and the Americans gained a much needed victory.