how was the idea of manifest destiny brought about by nationalism?
Confidence votes 15.1K. Manifest Destiny was the term used to describe the idea in the United States, beginning in the 1840s, that the US was destined to expand from ocean to ocean and all of North America from north to south. It developed, in part, from a great surge of nationalism (patriotism) following the War of 1812, as the nation expanded west.