👉 In the context of history and geography, a frontier is an area that has been historically occupied by people who have different cultural or political beliefs from those in the immediate vicinity. Typically, this refers to areas where there are significant differences between the cultures, religions, languages, and economic systems of the regions on either side of a border. The term "frontiersmen" can be interpreted as individuals or groups who moved westward from the east coast of North America during the 19th century.