Historical clue formulations

• Lt. col.'s inferior — 2023-10-16
• Rank under Lt. Col. — 2018-09-18
• ___ gen. — 2016-08-17
• Coll. student's declaration — 2012-11-11
• Capt.'s superior — 2012-02-26
• Capt.'s superior — 2011-05-17
• Army V.I.P. — 2011-04-26
• Capt.'s superior — 2011-04-12
• Lt. col.'s inferior — 2010-11-06
• Sgt. follower — 2009-12-04
• Key tag?: Abbr. — 2009-11-14
• Not minor: Abbr. — 2009-06-01
• Hot Lips Houlihan's rank: Abbr. — 2009-02-17
• Capt.'s superior — 2008-09-23
• ___ Gen. — 2006-09-29
• Capt.'s superior — 2005-12-27
• Rank below Lt. Col. — 2004-01-05
• Capt.'s superior — 2000-03-06
• Kind of scale: Abbr. — 1999-09-11
• Like a certain key: Abbr. — 1999-02-14
• Key abbr. — 1998-10-10
• Gold oak leaf wearer: Abbr. — 1998-01-15
• Capt.'s better — 1997-08-18