military vs combat area

military and combat area both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
combat area	Yes	No	No	No

military (noun)	combat area (noun)
the military forces of a nation	a military area where combat forces operate

military (adjective)	combat area (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