Fort Pitt (Pennsylvania) among Native Americans devastated the tribes of Ohio Valley and the Great Lakes areas. On August 1, 1763, most of the American Indians broke off the siege to intercept the approaching force under Colonel Bouquet. In the Battle of Bushy Run, Bouquet fought off the American Indian attack and relieved Fort Pitt on August 10. In 1772, after Pontiac's War, the British commander at Fort Pitt sold the building to two colonists, William Thompson and Alexander Ross. At that time, the Pittsburgh area was claimed by the colonies of both Virginia and Pennsylvania, which struggled for power over the region.
Siege of Fort Wayne the gate and asked if they were meeting for peace or war. Winamac replied "I don't know what to tell you, but you know that Fort Mackinac is taken, Detroit is in the hands of the British, Fort Dearborn has been taken, and you must expect to fall next, probably in a few days." Morning 5 September, the siege began when Chief Winamac's forces attacked two soldiers returning from an outhouse. The Native Americans assaulted the fort from the east side and burned the homes of the surrounding village. The Indians constructed two wooden cannons and were able to trick