Argonne vs Battle of Saint-Mihiel

Argonne and Battle of Saint-Mihiel both are nouns.

Word	Noun	Adjective	Verb	Adverb
Argonne	Yes	No	No	No
Battle of Saint-Mihiel	Yes	No	No	No

Argonne (noun)	Battle of Saint-Mihiel (noun)
an American operation in World War I (1918); American troops under Pershing drove back the German armies which were saved only by the armistice on November 11	a battle in the Meuse-Argonne operation in World War I (1918); the battle in which American troops launched their first offensive in France