Later, between 1000 and 1500 CE, the Mississippian and Oneota cultures built substantial settlements including the fortified village at Aztalan in southeast Wisconsin.
Hiljem, ajavahemikus 1000–1500 ehitasid Mississippi ja Oneota kultuuri elanikud märkimisväärseid asulaid, muuhulgas kindlustatud küla Aztalanis Kagu-Wisconsinis.