Battle Of Wyoming

The Battle of Wyoming was an encounter during the American Revolutionary War between American Patriots and Loyalists accompanied by Iroquois raiders that took place in Wyoming Valley, Pennsylvania, on July 3, 1778. More than three hundred Patriots were killed in a battle followed by a massacre, in which the Iroquois raiders hunted and killed fleeing Patriots before torturing to death thirty to forty who had surrendered.

The Iroquois were primarily Seneca and Onondaga, and only a few Mohawk.

http://en.wikipedia.org/wiki/Wyoming_Massacre