military vs general headquarters

military and general headquarters both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
general headquarters	Yes	No	No	No

military (noun)	general headquarters (noun)
the military forces of a nation	military headquarters from which a military commander controls and organizes the forces

military (adjective)	general headquarters (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