Sullivan Expedition Against the Iroquois Indians, 1779 - Fort Wyoming (PLAQUE)
Wilkes-Barre, Luzerne County, Pennsylvania
Marker Inscription
Mobilization camp of Sullivan's Army, June 23 - July 31, 1779.
Erected by Pennsylvania Historical and Museum Commission
The Story
In the summer of 1779 the Wyoming Valley became the assembly point for General John Sullivan's expedition against the Iroquois. From late June through the end of July, the army gathered, drilled, and stockpiled supplies at its mobilization camp here before marching north up the Susquehanna. This staging at Fort Wyoming set in motion one of the Revolution's largest offensive campaigns.
Why it matters
It marks where a major Continental army assembled for a campaign that reshaped the frontier, linking the war-torn Wyoming Valley to the broader struggle for the northern frontier.
The story behind this marker
AI contextThe era
By the summer of 1779, the Wyoming Valley was still raw with grief. This stretch of the Susquehanna, where Wilkes-Barre now stands, had been one of the most fought-over corners of the frontier during the Revolution. The valley's fertile bottomland drew settlers, and its exposed position drew war. A devastating raid the previous year had left the region scorched and frightened, its survivors scattered or huddled behind stockade walls.
Into that wounded landscape marched a Continental army. The war in the East had settled into a grinding stalemate, but along the northern frontier the fighting never really paused. Washington's government had decided that the raids striking at frontier settlements could no longer be answered only with defense. The response would be an offensive, and the Wyoming Valley — already a hard-won foothold — made a natural place to gather its strength.
For a few weeks that summer, this quiet river town became a place of drums, tents, and stacked supplies. An army does not simply appear at a battlefield; it must first be assembled, fed, and organized, and that unglamorous work happened here, in the shadow of the frontier's recent suffering.
People & events
From late June to the end of July 1779, this ground served as the mobilization camp for the army led by General John Sullivan. Sullivan, a New Hampshire lawyer turned soldier, had risen through the Continental ranks and was handed one of the largest independent commands of the war. His task was to lead an expedition into the country of the Iroquois nations to the north and west.
Mobilization is a story of logistics more than glory. Regiments arrived in stages. Provisions, powder, and the boats and pack animals needed to move an army through wilderness had to be gathered and counted. Soldiers drilled, waited, and grumbled, as soldiers always do, while officers wrestled with the endless problem of supply. Every day spent assembling here was a day the campaign was not yet marching — but also a day that made the march possible.
By the end of July, the waiting was over. The army that had taken shape along this river turned north, following the Susquehanna deeper into contested country. What had been a camp of tents and confusion became a moving column, and the campaign that historians would name for Sullivan was truly underway.
Its place in the American story
The expedition that gathered here was among the largest offensive operations the young United States mounted during the entire Revolution — and it was aimed not at a British army but at the Iroquois Confederacy, whose warriors were allied with the Crown. That fact makes this a difficult and important place in the American story, one where the Revolution's fight for independence and its expansion into Native homelands cannot be separated.
The campaign was designed to break the power of nations that had held this land for generations, and its consequences fell heavily on Iroquois communities. To understand the Revolution honestly is to understand that its western front was a war against Native peoples as much as against Britain, and that the two were, for the people living here, one and the same struggle.
A mobilization camp is where national policy became boots on the ground. The decision made in distant councils to strike the frontier took physical form here, in this valley, in the assembling of thousands of men. It is a reminder that the grand strategy of a war is carried out in specific, ordinary places.
If you visit
Stand here and picture the river as the highway it once was. The Susquehanna was the reason an army chose this spot — a route north into the country the campaign was bound for — and it still slides past much as it did then, indifferent to the plans made on its banks.
Look for the way the valley opens up, flat and broad, hemmed by hills. That openness is exactly what made it worth fighting over: good farmland, a natural corridor, a place armies and settlers both wanted. The plaque marks the staging, but the geography tells you why the staging happened here.
If you're building a road trip around the campaign, this is a natural beginning — the place where the army came together before it went anywhere. Take a moment for the layered history underneath the marker: a valley that had already seen terrible violence, becoming the launching point for more. It's a stop that rewards a thoughtful pause more than a quick photo.
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
- · General John Sullivan
Related events
- · Sullivan Expedition
Themes & tags
Nearby & related markers
Fort Wyoming
Wilkes-Barre, PA · est. 1947
Pennsylvania built Fort Wyoming in 1771 to press its claim in the Wyoming Valley, only to have it seized by the Connecticut settlers it was meant to check. Rebuilt in 1778, it served the following year as a mustering point for General John Sullivan's expedition against the Iroquois during the Revolution. The garrison held until 1784, when Continental and Pennsylvania troops withdrew and the works were destroyed.
Wilkes-Barre
Wilkes-Barre Township, PA · est. 1949
Wilkes-Barre was laid out in 1770 by settlers from Connecticut, who claimed this Susquehanna valley land under their colony's sea-to-sea charter—a claim Pennsylvania hotly disputed. The rival claims erupted into the Pennamite Wars of 1769–72 and again in 1784, while the Revolution brought the brutal Wyoming Massacre of 1778 nearby. Organized as the seat of Connecticut's "County of Westmoreland" in 1776, the town sat at the center of one of early America's fiercest boundary struggles.
Wilkes-Barre
Wilkes-Barre, PA · est. 1949
Wilkes-Barre was laid out in 1770 by settlers from Connecticut, who claimed this stretch of the Susquehanna under their colony's charter in defiance of Pennsylvania. The dispute boiled over into the Pennamite Wars of 1769–72 and 1784, and in 1778 the surrounding Wyoming Valley suffered the infamous Wyoming Massacre during the Revolution. Made the seat of the Connecticut-created "County of Westmoreland" in 1776, the settlement stood at the heart of a bitter contest over who owned the land itself.
Forty Fort
Forty Fort, PA · est. 1947
Forty Fort took its name from the forty Connecticut pioneers who came to the Wyoming Valley in 1769 and began the stockade the next year. It is remembered above all for the aftermath of July 3, 1778, when its surrender to a British, Loyalist, and Native force under Major John Butler was followed by the Wyoming Massacre, one of the war's bloodiest frontier episodes. The killing of settlers and prisoners shocked the young nation and hardened resolve against the Iroquois allies of the Crown.