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 Henry (1777) of Virginia and Pennsylvania that Indians living in the Ohio Country were planning attacks on frontier settlements on and around the Ohio River. Fort Henry, which had been constructed in 1774 to protect the settlers in the area around what is now Wheeling, West Virginia, was one of the rumored targets. In early August, General Edward Hand, the commander at nearby Fort Pitt warned Lieutenant David Shepherd and all of the local militia captains of the threat, ordering them to gather at Fort Henry. For a time thereafter, militia companies stayed at Fort Henry, improving its defenses and patrolling for