AP US History
The Era of Manifest Destiny refers to the 19th-century belief that the expansion of the United States across the American continents was both justified and inevitable. This ideology not only fueled territorial expansion, including westward migration and the acquisition of vast lands, but it also had significant social, political, and economic impacts, shaping national identity and policies regarding Native Americans and slavery. The ramifications of this era contributed to both the failure of Reconstruction and the initial phases of Manifest Destiny.