military campaign vs military

military campaign and military both are nouns.

Word	Noun	Adjective	Verb	Adverb
military campaign	Yes	No	No	No
military	Yes	Yes	No	No

military campaign (noun)	military (noun)
several related operations aimed at achieving a particular goal (usually within geographical and temporal constraints)	the military forces of a nation

military campaign (adjective)	military (adjective)
	associated with or performed by members of the armed services as contrasted with civilians
	characteristic of or associated with soldiers or the military
	of or relating to the study of the principles of warfare