Answer :
Explanation:
American frontier, in United States history, the advancing border that marked those lands that had been settled by Europeans. It is characterized by the westward movement of European settlers from their original settlements on the Atlantic coast (17th century) to the Far West (19th century).
American frontiers are characterized by the westward movement of European settlers from their original settlements to the west.
What do you mean by frontier?
A frontier refers to the geographical and political area beyond the boundary.
The American frontier is sharply different from settled areas along the east coast. The American frontier lies at the hither edge of the free land.
Thus, the settlers settled the frontier in its successive order.
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