USA HISTORY

Detailed explanation-1: -Before the American Civil War the idea of Manifest Destiny was used to validate continental acquisitions in the Oregon Country, Texas, New Mexico, and California. Later it was used to justify the purchase of Alaska and annexation of Hawaii.

Detailed explanation-2: -The settlement and annexation of Texas can be seen as an example of America pursuing its “manifest destiny.” Mexico had won its independence from Spain in 1821.

Detailed explanation-3: -The idea of manifest destiny-that the United States was destined to occupy the entire North American Hemisphere-came of age in the 1840s. It began with the annexation of Texas, which led to the Mexican-American War and the resulting great land cession.