pitched battle vs battle of Chickamauga

pitched battle and battle of Chickamauga both are nouns.

Word	Noun	Adjective	Verb	Adverb
pitched battle	Yes	No	No	No
battle of Chickamauga	Yes	No	No	No

pitched battle (noun)	battle of Chickamauga (noun)
a fierce battle fought in close combat between troops in predetermined positions at a chosen time and place	a Confederate victory in the American Civil War (1863); Confederate forces under Braxton Bragg defeated Union forces