military vs army unit

military and army unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
army unit	Yes	No	No	No

military (noun)	army unit (noun)
the military forces of a nation	a military unit that is part of an army

military (adjective)	army unit (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