British territory surrounded the globe. there was no western boundary.
The Appalachian Mountains marked the western boundary of British claims.
Frontier: The part of a country that borders another country; border; boundary
missouri river
Indiana begins at the western border of Ohio. Ohio is the western border is Pennsylvania
Nevada
Nevada and Arizona.
Arizona and Nevada.
The Pacific Ocean is the western boundry of California.
The river, Rio Uruguay, borders Uruguay's western border.
The Potomac River forms most of Maryland's western boundary.
Montana borders North Dakota and South Dakota to the east.
It ia on the eastern border of California. The western boundary of Callifornia is the Pacific Ocean,
The Colorado River forms the western boundary between Arizona and California
Arizona. All but the extreme northwestern part of the state has the Colorado River as its boundary with Nevada and California.
Bakersfield, California, is probably the largest city in the deserts of that state. It lies on the western boundary of the Mojave.
The state on the west coast of the United States with the longest coastline is California. California borders on the Pacific Ocean.