Answer:
Manifest Destiny was the idea that white Americans were divinely ordained to settle the entire continent of North America.
The ideology of Manifest Destiny inspired a variety of measures designed to remove or destroy the native population.
US President James K. Polk (1845-1849) is the leader most associated with Manifest Destiny.
Manifest Destiny inflamed sectional tensions over slavery, which ultimately led to the Civil War.
The Mexican-American war of 1846-1848 was justified in the opinions of many by the idea of "Manifest Destiny", since this held that the US was "destined" to expand to the Pacific Ocean.
