TRANS-APPALACHIAN WEST. The Trans-Appalachian West is the region west of the Appalachian Mountains and east of the Mississippi River. It stretches from the U.S. border with Canada down to Mexico. Originally blanketed with coniferous and deciduous forests, it was home to numerous Native American groups. The United States gained control of the region after the Treaty of Paris (1783), which ended the American Revolution. Treaties with the local Indian populations resulted in a flood of settlement over the next seventy years. The region's economy has been based on both agriculture and manufacturing. Nine states were formed out of the region and it is home to over 65 million people.
See alsoParis, Treaty of (1783) .