Illinois is a state in the Midwestern United States.- Illinois
The Mississippian culture was a Native American civilization that flourished in what is now the Midwestern, Eastern, and Southeastern United States from approximately 800 CE to 1600 CE, varying regionally.- Mississippian culture
It is located at the boundary of the Midwestern and Southern United States, flowing southwesterly from western Pennsylvania to its mouth on the Mississippi River at the southern tip of Illinois.- Ohio River
The largest city was Cahokia, believed to be a major religious center located in what is present-day southern Illinois.- Mississippian culture
The Census Bureau's definition consists of 12 states in the north central United States: Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, and Wisconsin.- Midwestern United States
Additionally, the Mississippi, Ohio, and Wabash rivers form parts of the state's boundaries.- Illinois
Major rivers in the region include, from east to west, the Ohio River, the Upper Mississippi River, and the Missouri River.- Midwestern United States
In the five centuries before European conquest, the Mississippian culture built numerous regional chiefdoms and major earthwork mounds in the Ohio Valley like the Angel Mounds near Evansville, Indiana as well as in the Mississippi Valley and the Southeast.- Ohio River
Kincaid site: A major Mississippian mound center in southern Illinois across the Ohio River from Paducah, Kentucky.- Mississippian culture
Cahokia, the largest regional chiefdom and Urban Center of the Pre-Columbian Mississippian culture, was located near present-day Collinsville, Illinois.- Illinois
Archaeological evidence indicates that Mississippian culture traits probably began in the St. Louis, Missouri area and spread northwest along the Mississippi and Illinois rivers and entered the state along the Kankakee River system.- Midwestern United States
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Indiana is a U.S. state in the Midwestern United States.
It is bordered by Lake Michigan to the northwest, Michigan to the north, Ohio to the east, the Ohio River and Kentucky to the south and southeast, and the Wabash River and Illinois to the west.
The Mississippian culture emerged, lasting from 1000 AD until the 15th century, shortly before the arrival of Europeans.