Cornplanter, Seneca chief, 1732?-1836

Cornplanter (born between 1732 and 1746–February 18, 1836), was a Seneca war chief and diplomat of the Wolf clan. As a chief warrior, Cornplanter fought in the French and Indian War and the American Revolutionary War. In both wars, the Seneca and three other Iroquois nations were allied with the British. After the war Cornplanter led negotiations with the United States and was a signatory of the Treaty of Fort Stanwix (1784). He helped gain Iroquois neutrality during the Northwest Indian War.

In the postwar years, Cornplanter worked to learn more about European-American ways and invited Quakers to establish schools in Seneca territory. Disillusioned by his people's poor reaction to European-American society, he had the schools closed and followed his half-brother Handsome Lake's movement returning to the traditional Seneca way and religion. The United States government granted him about 1500 acres of former Seneca territory in Pennsylvania in 1796 for "him and his heirs forever", which became known as the Cornplanter Tract.

After Cornplanter's lineage died off, the tract was planned by the federal government to be flooded as the site of a man-made reservoir after 1965 by completion of the Kinzua Dam on the Allegheny River. The remains of Cornplanter, his descendants, and an 1866 monument to him were relocated. Most of the remaining residents were forced to relocate to the Allegany Reservation of the federally recognized Seneca Nation of New York; they lost much of their fertile farmland.