Petersburg Campaign vs War between the States

Petersburg Campaign and War between the States both are nouns.

Word	Noun	Adjective	Verb	Adverb
Petersburg Campaign	Yes	No	No	No
War between the States	Yes	No	No	No

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