Fort Armstrong (Kittanning, Pennsylvania)

Kittanning · Pennsylvania · American Revolutionary War

Quick BriefConstructed in June 1779 under George Washington's orders and commanded by Lieutenant Colonel Daniel Brodhead, Fort Armstrong served as a temporary supply post and operational base for the Brodhead Expedition against the Seneca. The fort was abandoned that autumn and named in honor of Major General John Armstrong, hero of the 1756 Kittanning Expedition.

History & Significance

Fort Armstrong represented a pivotal moment in the Revolutionary War's western theater. Built in response to George Washington's directive to protect military convoys along the Allegheny River, the stockade fort was constructed by Lieutenant Colonel Stephen Bayard and his men at Manorville (near present-day Kittanning).

Though operational for only six months, the fort anchored Lieutenant Colonel Daniel Brodhead's famous 1779 campaign against the Seneca nation. Brodhead's forces marched from Fort Pitt with over 600 soldiers and militia, devastated Seneca settlements and cornfields, and returned to Fort Armstrong victorious.

Named at Brodhead's insistence for Major General John Armstrong—the celebrated commander of the 1756 Kittanning Expedition—the fort honored a distinguished officer who would later serve in the Continental Congress. Its strategic importance lay in securing the Ohio Country frontier and denying that region to British-aligned Native nations. By late 1779, the fort was abandoned as the campaign concluded, leaving only archaeological traces.