Cherry Valley massacre: Loyalists and Seneca Indian forces attack a fort and village in eastern New York during the American Revolutionary War, killing more than forty civilians and soldiers.

The Cherry Valley massacre was an attack by British and Haudenosaunee (Iroquois) forces on a fort and the town of Cherry Valley in central New York on November 11, 1778, during the American Revolutionary War. It has been described as one of the most horrific frontier massacres of the war. A mixed force of Loyalists, British soldiers, Senecas, and Mohawks descended on Cherry Valley, whose defenders, despite warnings, were unprepared for the attack. During the raid, the Seneca in particular targeted non-combatants, and reports state that 30 such individuals were killed, in addition to a number of armed defenders.