Final answer:
The Northwest Territory, established by the Northwest Ordinance, was north of the Ohio River and east of the Mississippi River, including states we now know as Illinois, Indiana, Michigan, Ohio, Minnesota, and Wisconsin.
Step-by-step explanation:
The Northwest Ordinance created the Northwest Territory of land north of the Ohio River and east of: a. The Mississippi River. This region included what are now Illinois, Indiana, Michigan, Ohio, Minnesota, and Wisconsin. The Northwest Ordinance was one of the significant achievements of the Confederation Congress and laid down a structured plan for the settlement and governance of the Northwest Territory. It established a method for admitting new states to the Union, prohibited slavery in the territory, and guaranteed a Bill of Rights for the settlers, ensuring representative government, religious freedom, trial by jury, and other basic freedoms.