Timeline story
Illinois Confederation at Cahokia
In 1778 Clark seized the Illinois Country posts at Kaskaskia, Prairie du Rocher and Cahokia, then held a council at Cahokia in the late summer at which he offered local tribal leaders peace or war.

The Illinois Confederation (Illiniwek) — Kaskaskia, Cahokia, Peoria, Michigamea, Tamaroa, and others — lived in that country; the National Park Service says only that many leaders at the council accepted the white belt of peace, while many tribes kept their British alliances. Kaskaskia leader Jean-Baptiste Ducoigne later signed the 1803 treaty made at Vincennes, in which the Kaskaskia tribe, described there as the remains of the Kaskaskia, Mitchigamia, Cahokia and Tamaroi, ceded its Illinois lands to the United States.
Clark’s aim was to weaken British leverage over Lieutenant Governor Henry Hamilton’s Indian allies and to blunt the British-funded raids on western settlers, Kentucky’s stations among them.
This is regional context for Kentucky. No source places Illinois towns in Kentucky; Swanton's 1953 handbook says only that hunting bands of Illinois at times visited the state. The story's Kentucky tie is George Rogers Clark's 1778 campaign.
- Cahokia: Peace or War with the Indians (National Park Service, George Rogers Clark NHP) on NPS.gov (opens in a new tab)
- Treaty with the Kaskaskia, August 13, 1803 (Oklahoma State University Library) on treaties.okstate.edu (opens in a new tab)
- Swanton 1953, Kentucky section, reproduced (Access Genealogy) on accessgenealogy.com (opens in a new tab)
Cite this story
Published . Last revised .
Chicago
Snowden, Shannon. "Illinois Confederation at Cahokia." Kentucky History Drive. Published September 16, 2026. Last revised October 12, 2026. https://kyhistorydrive.com/stories/illinois-confederation-at-cahokia/.
MLA
Snowden, Shannon. "Illinois Confederation at Cahokia." Kentucky History Drive, published 16 Sept. 2026, last revised 12 Oct. 2026, https://kyhistorydrive.com/stories/illinois-confederation-at-cahokia/.
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