Twelve Mile Camp
Unity Township, Westmoreland County, Pennsylvania
Marker Inscription
George Washington in 1758 set up a camp a mile north of this point while building Forbes Road. In 1774 Fort Shippen was built at the same site.
Erected by Pennsylvania Historical and Museum Commission
The Story
In 1758, as British and colonial forces cut Forbes Road through the wilderness toward the French stronghold at the Forks of the Ohio, a young George Washington helped set up an encampment near this spot. The rough military road was a decisive artery of the French and Indian War, opening the western country to armies and, later, settlers. A generation on, in 1774, Fort Shippen rose on the same ground as the frontier remained contested.
Why it matters
Forbes Road and its camps helped decide the struggle for the Ohio Valley and became a lasting highway of westward movement into the American interior.
The story behind this marker
AI contextThe era
In 1758, the forests of western Pennsylvania were the front line of a war for a continent. Britain and France were fighting for control of the Ohio Valley, and the prize was the strategic point where two rivers meet to form the Ohio — the Forks, guarded by the French at Fort Duquesne. Whoever held that ground held the gateway to the American interior.
The British answer was to cut a road straight through the wilderness toward it. This was rugged, unmapped country — steep ridges, dense timber, and few reliable trails. Moving an army and its cannon across it meant building the very route as you advanced, mile by hard-won mile.
Along that new road, camps were established as the expedition pushed forward. This marker remembers one of them, set up in 1758 as the road was being carved through, a small ordered clearing in a vast unbroken forest.
People & events
The Forbes Expedition — the campaign that built this road — was one of the decisive British efforts of the French and Indian War. Its purpose was to take the Forks of the Ohio, and its lasting legacy was the road itself, a military artery hacked through the mountains.
Among the officers on that march was a young George Washington, still years away from national fame, commanding Virginia troops and learning the hard lessons of frontier warfare that would serve him for the rest of his life. In 1758 he was part of the force setting up camp along this route as the road advanced.
The ground had a second act. In 1774, as the frontier remained tense and dangerous, Fort Shippen was raised on the same site. A place that began as a temporary military camp thus became, for a time, a fixed point of defense in a country still very much contested.
Its place in the American story
Roads change history quietly. Forbes Road was built for a single wartime campaign, but once it existed it could not be un-built — and what began as a supply line for soldiers became a highway for settlers.
The fall of the French position at the Forks tipped the long struggle for the Ohio Valley in Britain's favor, and it opened the western country to a wave of movement that would continue for generations. The camps and forts strung along the route, this one among them, were the infrastructure of that opening.
So a spot that looks like nothing more than a wooded rise in Westmoreland County sits on one of the seams of American expansion. The path that armies cut here became a channel through which the young nation would pour westward into its interior.
If you visit
There is no fort to tour here and no cannon on display — what you're visiting is a place, and the layered history stacked on it. Read the marker, then look at the land itself: the lay of the ridges and hollows that made building a road through here such brutal work.
Try to picture two very different scenes on the same ground. First, an 18th-century army camp — tents, fires, exhausted men and horses, the constant labor of clearing the way ahead. Then, a generation later, a frontier fort built for defense on that identical spot.
It's a natural stop for anyone tracing the old routes west across Pennsylvania. The country here still feels like the edge of something, and that's exactly what it once was — the moving frontier of a war that decided who would inherit the continent.
Written by AI to add context, grounded in the marker’s inscription and the historical record. The inscription above is the original, unaltered text.
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Related people
- · George Washington
Related events
- · Forbes Expedition
- · Building of Forbes Road
Themes & tags
Nearby & related markers
Forbes Road, 1758, Fort Bedford to Fort Duquesne - Fort Ligonier (PLAQUE)
Ligonier, PA · est. 1930
Fort Ligonier was raised in 1758 by order of General John Forbes as the last major stronghold on the road to Fort Duquesne during the French and Indian War. Officers including Colonel Henry Bouquet and Colonel John Armstrong distinguished themselves here, and young Colonel George Washington, Colonel James Burd, and Lieutenant Colonel Hugh Mercer all served in the campaign that passed this way. The fort anchored the British advance through the Pennsylvania wilderness.
Forbes Road
Murrysville, PA · est. 1960
In November 1758, as the British pushed toward the French stronghold at the Forks of the Ohio, a young Colonel George Washington established a supply camp on the hill south of here to help feed the advance along the newly cut Forbes Road. He did so under orders from Colonel Henry Bouquet, describing himself as commanding the troops "to ye Westward." The camp was one link in the long logistical chain that carried Forbes's army across the Pennsylvania mountains during the French and Indian War.
Forbes Road, 1758, Fort Bedford to Fort Duquesne - Tomahawk Encampment (PLAQUE)
Jenner Township, PA · est. 1930
Part of the 1758 Forbes Road built during the French and Indian War, this point at the foot of Laurel Hill marks the Tomahawk Encampment on the army's push toward Fort Duquesne. Each such camp was a measured stage in General John Forbes's methodical advance, guarded and provisioned as the troops climbed the Alleghenies. The marker fixes the spot along the road running toward Fort Ligonier.
Forbes Road - The Clear Fields
Jenner Township, PA · est. 1952
When General Forbes weighed how to reach Fort Duquesne in 1758, open meadows like the Clear Fields along the Raystown Path tipped the balance. Ample forage for cavalry and draft animals led him to favor this northern route over Braddock's older road to the south — a logistical choice that shaped the whole campaign. Fort Dudgeon, known as Tomahawk Camp, stood a short way to the north.