The United States territorial expansion began after they got their independence in 1776 from the British Empire. The different territories that the USA obtained were from other countries. The 1783 Treaty of Paris identified the original borders of America, and it consisted of the following thirteen states: New Hampshire, Massachusetts Bay, Rhode Island, Connecticut, New York, New Jersey, Pennsylvania, Delaware, Maryland, Virginia, North Carolina, South Carolina, and Georgia. The United States of America grew westward as a nation from thirteen original colonies to a trans-continental …show more content…
Almost everyone believed that America should extend from the Atlantic to the Pacific. The two words Manifest Destiny soon became in meaning that those who favored expansion had God on their side. It appealed to both the supporters of slavery, those who wanted Texas annexed, and to antislavery supporters who favored adding California to the Union. The Manifest Destiny claimed that the United States would benefit from trade, commercial advantages, and from lower tariffs. It was a belief that the United States was divinely mandated to expand from coast to coast, the country began to use any means necessary to expand. Among these were unprovoked wars, purchases from other countries, and …show more content…
Mexico had faced serious problems after it had become independent in 1821 from Spain, and it had become a republic. Its northern territories (Texas and California) were under populated; therefore, initially Mexico had encouraged American settlement and trade. Spain accepted the proposal of American settlers in Mexico, and by 1830 over twenty thousand Americans and one thousand slaves were living in Texas. Texas won its independence from Mexico in 1836, and it was declared to the Union in 1845. In 1846 to 1848, almost all of Southwest, including the remainder of Texas, New Mexico, and California, was given to the United