ONU occupies the traditional land of the Erie, Kaskaskia, Kickapoo, Myaamia and Shawnee Peoples, as well as the Osage Nation.
This animation by SunIsUp on Tumblr appears to be based on a chronological collection of land cession maps by Sam B. Hillard, of Louisiana State University, that was published in 1972 in the Annals of the Association of American Geographers.
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