military vs armed combat

military and armed combat both are nouns.

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

military (noun)	armed combat (noun)
the military forces of a nation	an engagement fought between two military forces

military (adjective)	armed combat (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