Gnadenhutten Massacre

March 8, 1782:

 Gnadenhütten massacre: Ninety-six Native Americans in Gnadenhutten, Ohio, who had converted to Christianity are killed by Pennsylvania militiamen in retaliation for raids carried out by other Indians. The Gnadenhutten massacre, also known as the Moravian massacre, was the killing on March 8, 1782, during the American Revolutionary War, of 96 Christian Lenape (Delaware) by colonial American militia from Pennsylvania. The militia attacked Lenape at the Moravian missionary village of Gnadenhütten, Ohio.
The site of the village has been preserved. A reconstructed cabin and cooper's house were built there, and a monument to the dead was erected. The village site has been listed on the National Register of Historic Places.
In an unrelated event in 1755 during the French and Indian War (part of the Seven Years War), Native Americans allied with the French massacred 11 missionaries and converted Munsee Lenape at a Moravian mission village in Pennsylvania that bore the same name. The term Gnadenhutten massacre usually applies only to the 1782 event in Ohio.

Not exactly a bright spot in the history of the nation.