Historical clue formulations

• U.S. Army E-7 — 2019-01-04
• U.S. Army E-7 — 2016-02-05
• Army E-7: Abbr. — 2014-10-12
• Platoon V.I.P. — 2012-07-06
• Certain NCO — 2008-04-29
• Platoon V.I.P. — 2005-01-30
• Army noncom: Abbr. — 2003-07-19
• Certain NCO — 1996-08-24
• Army E-7 — 1995-07-15
• M.Sgt.'s inferior — 1994-05-01
• Army rank, for short — 1994-02-01