In U.S. History, 19th Century use of the term "American Frontier" refers to
Athe area where pioneer settlement ended.
Bthe Atlantic or Pacific coast of North America.
Cthe territory east of the Appalachian Mountains.
Dany territory beyond the thirteen original colonies.
In U.S. History, 19th Century use of the term "American Frontier" refers to
Athe area where pioneer settlement ended.
Bthe Atlantic or Pacific coast of North America.
Cthe territory east of the Appalachian Mountains.
Dany territory beyond the thirteen original colonies.
