Eastern U.S.A.
The southern half of the eastern boundary of Alabama is the Chattahoochee River.
The Connecticut River
Two rivers partially form Illinois State's Eastern boundary. The Wabash River is one river that forms Illinois' boundary. The Ohio River is the other river that forms the state's boundary.
the river is the Indus river :)
chattahoochee river
The Mississippi River forms the western boundary of the State of Illinois.
The Ural Mountains,the Ural river,and the Caspian Sea.
Mississippi
Mississippi
Red River
The Mississippi River is the East boundary for Arkansas.
The Mississippi River serves as the eastern boundary of the state of Missouri.