The Annexation of Texas, California, and New Mexico by the USA- The 1775−1783 American War of Independence by Dr Vladislav B Sotirovic https://countercurrents.org/2025/02/the-annexation-of-texas-california-and-new-mexico-by-the-usa-the-1775%e2%88%921783-american-war-of-independence/ The acquisition of the vast territory from Louisiana to the Pacific Ocean (Texas, New Mexico, and California), nonetheless, forced Washington to deal with newly emerged challenges and problems as the Caribbean area, the Pacific area, an isthmian canal, and above all problems the issue of slavery, which now threatened to expand into the whole area of the Wild West. Before 1776, the Americans were not so keen to settle the interior (westward from the Appalachian Mt.) which they called the “back-country”. However, after 1803, the “back-country” was renamed “frontier” and the line of settlement advanced westward with great speed. Before the end of the American Revolution in 1783 that line was still largely east of the Appalachian Mt. but by 1819 the “frontier” crossed the Mississippi River and by 1848 reached the Pacific coast. In such a way, the “natural borders” of the USA (from the ocean to the ocean) have been finally established.