On July 3, the British spotted the American militia near Forty Fort. Butler wanted to lure the Americans away from their fortifications. He ordered for Fort Wintermute to be set ablaze. The Patriots, believing it signified a British retreat, advanced rapidly. British soldiers, with the assistance of about 700 Native American allies, mostly from Iroquois nations, ambushed the oncoming American militia. In the end, nearly 300 Wyoming Valley settlers were killed in what would be known as the Wyoming Massacre. Today, in the Borough of Wyoming, a monument marks the gravesite of the victims from the battle.