After the Civil War two new "frontiers" of opportunity emerged in the United States. They were the South and the West.
The American frontier is distinctly different from the European frontier, which runs through densely populated areas and is defended. The fact that the American frontier is located at the farthest limit of unclaimed land is its most important feature.
In census records, it is referred to as the settlement's periphery if there are two or more occupants per square mile. Since the term is ambiguous, a precise definition is not necessary for our purposes.
We will take into account the entire frontier region, including the Indian country and the outside limits of what the census describes as the "settled area."
To know more about civil war:
https://brainly.com/question/11874600
#SPJ4