USA HISTORY

Detailed explanation-1: -The frontier is the margin of undeveloped territory that would comprise the United States beyond the established frontier line. The U.S. Census Bureau designated frontier territory as generally unoccupied land with a population density of fewer than 2 people per square mile (0.77 people per square kilometer).

Detailed explanation-2: -A frontier is the political and geographical area near or beyond a boundary. A frontier can also be referred to as a “front". The term came from French in the 15th century, with the meaning “borderland"-the region of a country that fronts on another country (see also marches).

Detailed explanation-3: -The idea of a “frontier, ” of a place that is an edge between the known and the unknown, the settled and the wild, has a prominent place in American history. Sometimes it is a particular territory, such as the North American continent west of the Missouri River.

Detailed explanation-4: -Land frontier means the land or territory that forms the furthest extent of a country’s settled or inhabited regions. India has 15, 200 kilometers of land borders and a coastline of about 7, 516 kilometers.