Historical clue formulations

• Volunteers — 2022-03-23
• Joins up — 2020-01-18
• Recruits — 2019-01-03
• Joins forces? — 2018-01-14
• Eschews the draft? — 2013-01-18
• Joins up — 2011-02-08
• Joins up — 2006-01-16
• Volunteers — 1994-05-18