military vs combined operation

military and combined operation both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
combined operation	Yes	No	No	No

military (noun)	combined operation (noun)
the military forces of a nation	a military operation carried out cooperatively by two or more allied nations or a military operation carried out by coordination of sea, land, and air forces

military (adjective)	combined operation (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