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.
Fort Defiance (Illinois) of Natural Resources assumed control of Fort Defiance on July 31, 2014 with the goal of returning it to state park status. The park is a satellite of Horseshoe Lake State Fish and Wildlife Area. On his trek up the Mississippi, Frenchman Pierre Laclède was among the first Europeans to land on the southern tip of what is now Illinois. Fort Defiance (Illinois) Fort Defiance, known as Camp Defiance during the American Civil War, is a former military fortification located at the confluence of the Ohio and Mississippi rivers near Cairo in Alexander County, Illinois. The strategic significance of the