HistoricSiteMarkers
American Revolution

Thompson's Island

Pleasant Township, Warren County, Pennsylvania

Marker Inscription

An advance party of Brodhead's expedition of 1779 into the Seneca country had a skirmish here with 30 or 40 Indians, the only fighting which took place in that campaign, and the only Revolutionary battle in northwestern Pennsylvania.

Erected by Pennsylvania Historical and Museum Commission

The Story

During Colonel Daniel Brodhead's 1779 expedition against the Seneca, an advance party clashed here with thirty or forty Native warriors in a brief but sharp skirmish. It was the only fighting of the entire campaign and, by the marker's reckoning, the sole Revolutionary War engagement in northwestern Pennsylvania. The rest of Brodhead's march met little resistance as it moved through the Allegheny country.

Why it matters

This small skirmish marks the Revolution's northwestern edge in Pennsylvania, a reminder that the war reached deep into Indigenous homelands far from its famous battlefields.

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Related people

  • · Daniel Brodhead

Related events

  • · Brodhead Expedition of 1779

Themes & tags

Nearby & related markers

Buckaloons

Brokenstraw Township, PA · est. 1947

Buckaloons stood at the meeting of Brokenstraw Creek and the Allegheny River, a site so long inhabited that excavated burial mounds attest to its deep antiquity. In 1749 the French officer Céloron de Blainville passed through on his expedition to claim the Ohio Valley, and in 1779 the village was destroyed during Colonel Daniel Brodhead's Revolutionary War campaign against the Seneca. Its story spans centuries of Native life along these rivers.

Indian Paint Hill

Limestone Township, PA · est. 1947

Across the river from this spot, deposits of red ochre lay alongside natural petroleum springs, and Native peoples drew on both to make the pigments they used for face and body paint. The combination of mineral earth and seeping oil gave the place its enduring name, Indian Paint Hill. It is a small window into the everyday resourcefulness of the region's Indigenous inhabitants.

Mead Island Tradition

Conewango Township, PA · est. 2021

Along the Allegheny River, archaeologist Dr. Stanley Lantz of the Carnegie Museum first identified the Mead Island culture in 1967, on the island that gives the tradition its name. Excavations there and at other sites revealed a Native American people who dominated the Middle Allegheny River Valley during the early Late Woodland period, roughly 960 to 1360 AD. Their villages and material culture help fill in the long human story of the region centuries before European contact.

Warren County

Warren, PA · est. 1981

Created in 1800 and named for General Joseph Warren, the patriot doctor killed at Bunker Hill, this county built its economy on oil and timber. Within its bounds lay the Cornplanter Indian Grant, land set aside for the Seneca chief who chose accommodation with the young United States. The county thus carried both a Revolutionary namesake and a living Native American presence.