they were the Oregon and spanish
Spain forms the eastern boundary of Portugal.
The southern half of the eastern boundary of Alabama is the Chattahoochee River.
Eastern U.S.A.
A divergent boundary.
The Indian Ocean forms the eastern boundary of Africa.
The country is Eritrea, and it's eastern boundary is formed by the Red Sea.
Atlantic ocean
The Atlantic Ocean.
Spain is the only country to border Portugal to the east.
The eastern boundary was the Mississippi River, while the western boundary was the original 13 colonies along the Atlantic coast.
The eastern boundary of ancient Egypt was typically the Red Sea, although it varied at times. The western boundary was the Western Desert. The northern boundary was the Mediterranean Sea.
The Mississippi River is the East boundary for Arkansas.