John Abeel III known as Gayë́twageh in the Seneca language and thus generally known as Cornplanter, was a Seneca chief and diplomat. As a war chief, Cornplanter fought in the American Revolutionary War on the side of the British. After the war Cornplanter led negotiations with the United States and was a signatory of the Treaty of Fort Stanwix (1784), the Treaty of Canandaigua (1794), and other treaties. He helped ensure Seneca neutrality during the Northwest Indian War.