Fort Shirley
Shirleysburg, PA · est. 1947
Built in 1755–56 by the frontier trader and Indian agent George Croghan, Fort Shirley began as a stockade and grew into a key link in the chain of forts guarding Pennsylvania's frontier west of the Susquehanna River during the French and Indian War. In 1756 it served as the base for Colonel John Armstrong's expedition against the Delaware village of Kittanning. Its role reflected the desperate effort to defend backcountry settlers from raids during that conflict.