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
Coshocton, Ohio moved further west to the Sandusky River area, closer to the British Fort Detroit. From there the British and Lenape raided colonial frontier settlements. The Lenape sympathetic to the new United States stayed near Coshocton. Chief Newcomer signed the Fort Pitt Treaty of 1778, by which the Lenape hoped to secure their safety during the War, and he promised scouts and support to the rebel colonists. They also hoped to lay the base for a Native American state in the new nation. In retaliation for frontier raids by hostile Lenape and British, Colonel Daniel Brodhead of the American militia ignored