Continental Army Assumes Control of Fort Pitt

When hostilities began in April 1775, Fort Pitt was in British hands — but British control of the western frontier was already nominal. Virginia militia forces and Pennsylvania interests had long contested authority over the fort and the surrounding territory. By mid-1775, Continental and Virginia forces effectively took control of the installation, beginning its transformation from a British garrison into the Continental Army's western headquarters.

The transition was not accompanied by fighting — the British garrison was small and the political situation made resistance futile. But the assumption of control had immediate strategic consequences. Fort Pitt became the supply and communications hub for the entire western frontier, the point through which men, arms, and provisions moved toward the Ohio Valley and beyond. Virginia's claims to the territory around Pittsburgh complicated the Continental command structure throughout the war, with Virginia militia and Continental forces sometimes operating in the same area under unclear authority.

The fort that the Continentals inherited was formidable: a five-sided structure with earthworks bastions, capable of housing hundreds of men, situated on the one piece of ground that could not be bypassed by any force moving into the Ohio Valley. Its value was obvious and its maintenance was consistently difficult — supply lines from Philadelphia and Carlisle were long, and the competing demands of the eastern theater meant western requests were routinely underfulfilled.