Cherry Valley Massacre
The Cherry Valley massacre was an attack by British and Seneca Indian forces on a fort and village in eastern New York on November 11, 1778, during the American Revolutionary War, and has been described as one of the most horrific frontier massacres of the Revolution.
The Senecas were angered over the burning of Tioga by forces under Colonel Thomas Hartley, his accusations of atrocities by the Iroquois at Wyoming, and the recent destruction of their settlement of Onoquaga.
The British supplied their native allies with muskets and gunpowder and advised raids against civilian settlements, especially in New York, Kentucky, and Pennsylvania. Joint Iroquois-Loyalist attacks in the Wyoming Valley and at Cherry Valley in 1778 provoked Washington to send the Sullivan Expedition into western New York during the summer of 1779. There was little fighting as Sullivan systematically destroyed the Native American winter food supplies, forcing them to flee permanently to British bases in Quebec and the Niagara Falls area.