rank and file vs military machine

rank and file and military machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
rank and file	Yes	No	No	No
military machine	Yes	No	No	No

rank and file (noun)	military machine (noun)
the ordinary members of an organization (such as the enlisted soldiers of an army)	the military forces of a nation
people who constitute the main body of any group