Wyoming Valley Massacre

Wyoming Valley Massacre, event in the American Revolutionary War. A force of Loyalists, Butler's Rangers, and Iroquois led by John Butler defeated a band of 300 Connecticut settlers led by Zebulon Butler in Wyoming Valley, Pa., in July 1778. A massacre ensued in which the Iroquois butchered the survivors. The incident horrified both sides; it made the English wary of Native American allies and prompted George Washington to attack the Iroquois (1779).

See also: Revolutionary War in America.