Siege of Fort Pitt Siege of Fort Pitt The Siege of Fort Pitt took place during June and July 1763 in what is now the city of Pittsburgh, Pennsylvania, United States. The siege was a part of Pontiac's War, an effort by Native Americans to remove the British from the Ohio Country and Allegheny Plateau after they refused to honor their promises and treaties to leave voluntarily after the defeat of the French. The Native American efforts of diplomacy, and by siege, to remove the British from Fort Pitt ultimately failed. This event is best known as an early instance of biological warfare, where
Fort Randolph (West Virginia) to examine the land around Point Pleasant. Many other British colonists and surveyors did the same over the next few years. The American Indians of the Ohio Country, who hunted on the land south of the Ohio River, had not been consulted in the 1768 treaty. The eventual result was Dunmore's War in 1774, fought primarily between militia from Virginia and Shawnees and Mingos from the Ohio Country, led by Chief Cornstalk. The Battle of Point Pleasant, the only major battle of the war, was fought on the future site of Fort Randolph. After the battle, a small fort called