In the summer of 1778, a crisis loomed over the hills and valleys surrounding Fort Pitt. Years of broken promises and willful transgressions had weakened the bonds between American officials at Pittsburgh and the Great Lakes and Ohio Country Indians on whose friendship they desperately depended. One by one, the Mingo, Wyandot, and Shawnee severed their ties with the Americans, siding with the British at Detroit and going on the offensive against frontier settlements.

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We talked to reenactor Jeremy Turner about living history and its importance in educating the public about the lives of his American Indian ancestors who once called the Ohio River Valley home. Turner will travel to Pittsburgh this month to help tell the story of the Delaware Treaty to mark its 240th anniversary.

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On Aug. 11, 1779, Gen. Brodhead and 605 men, from the 8th Pennsylvania and 9th Virginia Regiments, marched north toward Conewago. The ensuing encounter became known as the Battle of Thompson Island, the only Revolutionary War battle fought in northwestern Pennsylvania

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