 The Susquehannock, who had been cultivating the land in that area of Pennsylvania, became willing allies against the colonists as the French and Indian War began.At the onset of the war, the Susquehannock attacked colonial frontier settlements using the passes that existed in Blue Mountain through Manada Gap, Indiantown Gap, and Swatara Gap.Because of these attacks, a chain of fortifications was established across the northern tier of Lebanon County, to include Fort Indiantown Gap.