Who's son concluded a set of treaties which ended the American Revolutionary War?
John Petty, 2nd Marquess of Lansdowne John Henry Petty, 2nd Marquess of Lansdowne (2 May 1765 – 15 November 1809) was a British peer and politician. He was the eldest son of William Petty, 1st Marquess of Lansdowne, known to history as the Earl of Shelburne, the British prime minister who concluded the Peace of Paris recognising American independence, by his first wife, Lady Sophia Carteret.
Treaty of Fort Pitt 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 written treaty between the new United States of America and any American Indians—the Lenape (Delaware Indians) in this case. Although many informal treaties were held with Native Americans during the American Revolution years of 1775–1783, this was the only one that resulted in a formal document. It was signed at Fort Pitt, Pennsylvania, site of present-day downtown Pittsburgh. It was essentially a formal treaty of alliance.