The Treaty of Fort Pitt is signed. It is the first formal treaty between the United States and a Native American tribe.

Treaty of Fort Pitt

1778 treaty between the United States and Lenape

The Treaty of Fort Pitt, also known as the Treaty With the Delawares, the Delaware Treaty, or the Fourth Treaty of Pittsburgh, was signed on September 17, 1778, and was the first formal treaty between the new United States of America and any American Indians, in this case the…