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 Sandusky their territory. But in 1761 British General Jeffery Amherst ordered the erection of Fort Sandusky on Sandusky Bay in order to strengthen the line of defense from Fort Detroit, near the western end of Lake Erie, to central Lake Erie, and to Fort Pitt at the confluence of the Allegheny and Monongahela rivers, which controlled access to the Ohio River and the western frontier of the British colonies. The Seven Years' War continued in Europe until 1763 between Britain and France. Fort Sandusky was a small British fort established on the southeastern shore of Sandusky Bay off Lake Erie in