American Civil War vs Petersburg Campaign

American Civil War and Petersburg Campaign both are nouns.

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

American Civil War (noun)	Petersburg Campaign (noun)
civil war in the United States between the North and the South; 1861-1865	the final campaign of the American Civil War (1864-65); Union forces under Grant besieged and finally defeated Confederate forces under Lee