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: -It spread along the Great Lakes into Michigan, Wisconsin, Indiana, and Illinois to carry wheat and corn and hogs with it. In the centre, it spread from Kentucky and Tennessee and crossed the Mississippi and reached the great bend of the Missouri from which the traders and trappers made their way on westward.

Detailed explanation-3: -This is usually referred to as the trans-Mississippi frontier. The region faced by the American pioneers in this last advance was different in character from anything that they had met before, and the frontiers that emerged were more varied and more colourful than any earlier environments had produced.

Detailed explanation-4: -One of the main reasons people moved west was for the land. There was lots of land, good soil for farming, and it could be bought at a cheap price. In addition, it was very crowded living on the East Coast. The population of the United States was growing at a very fast rate.