Midwestern United States
Louisiana Purchase
The Louisiana Purchase (French: Vente de la Louisiane, lit. 'Sale of Louisiana') was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River's drainage basin west of the river.
Northwest Territory
The Northwest Territory, also known as the Old Northwest and formally known as the Territory Northwest of the River Ohio, was formed from part of the unorganized western territory of the United States after the American Revolution.
Plains Indians
Plains Indians or Indigenous peoples of the Great Plains are the Native American tribes and First Nations peoples who have historically lived on the Interior Plains (the Great Plains) of North America.