 The British themselves set fire to the part-completed corvette to prevent it falling into American hands.Chauncey and Dearborn next defeated the British army on the Niagara River at the Battle of Fort George on 27 May.At both York and Fort George, Chauncey's schooners and gunboats (commanded at the latter engagement by Oliver Hazard Perry) had proved very effective in supporting troops landing from boats, by suppressing British batteries and inflicting heavy casualties on British troops who attempted to prevent the Americans landing.