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A frontier is most often defined as the border between two countries. However, it can also be classified as the area beyond settled or “known” territory, sometimes occupied by a hostile population. The name comes from the Old French frontiere, which means “boundary-line of a country.” For much of history, the idea of a frontier was a little-known concept as kingdoms and city-states had loosely defined borders that changed constantly. However, Ancient empires such as China and Rome did... więcej
Salem Press Encyclopedia, 2023. 3p.
