Grant divides his force into several parts the next morning.

A company of the 77th, under a Captain McDonald, approaches the fort with drums beating and pipes playing as a decoy.

A force of four hundred men lies in wait to ambush the enemy when they go out to attack McDonald, and several hundred more under the Virginian Major Andrew Lewis are concealed near the force's baggage train in the hope of surprising an enemy attack there.

The French and native force is in fact much larger than anticipated, and moves swiftly.

They overwhelm McDonald's decoy force and overrun the party that had been meant to ambush them.

Lewis's force leaves its ambush positions and goes to the aid of the rest of the force, but the French and natives have by now then gained a point of high ground above them and force them to retire.

The natives use the forest to their advantage.

In the one-sided battle in the woods, the British and American force suffers three hundred and forty-two casualties, of whom two hundred and thirty-two are from the 77th Regiment, including Grant, who is taken prisoner.

Out of the eight officers in Andrew Lewis’s Virginian contingent, five are killed, one is wounded and Lewis himself is captured.

Nevertheless, most of Grant's force escapes to rejoin the main army under Forbes and Bouquet.

The Franco-native force suffers only eight killed and eight wounded.

A plaque on the Allegheny County Courthouse, erected in 1901 commemorates the site of the battle, and the hill where the battle was fought is today called Grant Street, in Pittsburgh.