Chauncey sortied again on July 21 with 13 vessels. Six days later, he embarked a battalion of 500 troops commanded by Colonel Winfield Scott at the Niagara. Chauncey sought to relieve the British-Native blockade of Fort George, by attacking British supply lines at Burlington Heights at the western end of Lake Ontario. Winfield Scott's force disembarked east of the heights at Burlington Beach (present day Burlington) on July 29, but found the defenders too well entrenched for any assault to be successful.