ignati
How did the Western frontier change over time?
American Old West
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bulldog1
Replied to: How did the Western frontier change over time?
Until the 17th century, the Western frontier was the crest of the Appalachian mountains.
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Wutog
Replied to: Until the 17th century, the Western frontier was the crest of...
By the 19th century, the Mississippi River formed America's Western border.