rank and file

Short definition from Wiktionary

Noun

1. 1
   Enlisted soldiers in a military organization, as would be arrayed in a grid pattern with ranks and files.
2. 2
   The members of an organization, community, etc. who are not in leadership positions.
3. 3
   Alternative form of rank and file.

Adjective

1. 1
   Belonging or pertaining to the rank and file.