Overland Campaign vs American Civil War

Overland Campaign and American Civil War both are nouns.

Word	Noun	Adjective	Verb	Adverb
Overland Campaign	Yes	No	No	No
American Civil War	Yes	No	No	No

Overland Campaign (noun)	American Civil War (noun)
American Civil War; a series of indecisive battles in Grant's campaign (1864) against Lee in which both armies suffered terrible losses	civil war in the United States between the North and the South; 1861-1865