military vs battle line

military and battle line both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
battle line	Yes	No	No	No

military (noun)	battle line (noun)
the military forces of a nation	the line along which warring troops meet

military (adjective)	battle line (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