* The Eastern United States: This includes the states of Virginia, North Carolina, South Carolina, Georgia, Alabama, Mississippi, Tennessee, and Kentucky.
* The Midwest: This includes Missouri, Iowa, Illinois, Kansas, Nebraska, South Dakota, and North Dakota.
* The Great Plains: This includes parts of Wyoming, Montana, and Oklahoma.
Key Siouan language families:
* Eastern Siouan: This family was centered in the Eastern Woodlands and includes languages like Catawba, Tutelo, and Occaneechi. These tribes were largely displaced and assimilated by European colonists.
* Western Siouan: This family included languages spoken in the Great Plains and the Midwest. It includes major tribes like the Lakota, Dakota, Nakota, Osage, Omaha, Ponca, Kansa, Iowa, Otoe, and Missouri.
It is important to note that the specific territories of individual Siouan-speaking tribes varied throughout history due to factors like migration, conflict, and treaty agreements.