rank and file

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The enlisted troops, excluding noncommissioned officers, in an army.
• noun The people who form the major portion of a group, organization, or society, excluding the leaders and officers.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Common soldiers, as would be arrayed in a grid pattern with ranks and files.
• noun idiomatic Those lacking any particular title or status; those having no station.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun people who constitute the main body of any group
• noun the ordinary members of an organization (such as the enlisted soldiers of an army)