The Mississippi River forms the western boundary of the State of Illinois.
The Mississippi River forms the western border of Illinois.
The Mississippi River forms the western boundary of Illinois.
Illinois is bordered by the Mississippi River on the west.
Mississippi river
Mississippi river
The Atlantic Ocean.
Missisippi
western
There was one major geographic feature that formed the Western boundary of the 13 colonies. This boundary feature was the Appalachian Mountains.
northern Illinois, southern Illinois , eastern Illinois,western Illinois , Illinois ,northwestern , loyola, u of Illinois Chicago, depaul , Chicago state , bradley ,
Two, the Western and Northern Hemispheres.