Historical clue formulations

• Armory grp. — 2012-04-24
• Mil. unit below a division — 2011-12-18
• Colonel's div. — 2008-09-18
• Armory grp. — 2005-11-20
• Grp. of battalions — 2005-02-13
• Mil. unit — 1995-06-04