👉 A frontier is a line or region that separates an area of land from another. In geography, it refers to a specific type of territory where humans have historically lived and interacted with each other. Frontiersmen were those who inhabited these territories as early as prehistoric times, and their activities included hunting, gathering, farming, and trade. As the world expanded over time, they would eventually leave these areas behind and move on to new lands or regions of land that might be more suitable for human