Manifest Destiny: This term refers to the belief prevalent during the Pre-Civil War era that it was America's destiny to expand its territory from coast to coast.
Sectionalism: Sectionalism describes intense loyalty and pride towards one's own region (such as North or South) rather than identifying primarily as an American.
Abolitionist Movement: The abolitionist movement sought to end slavery in America, gaining momentum especially in northern states during the pre-Civil War period.