Historical clue formulations

• Makes an enthusiastic attempt — 2021-11-16
• Fights — 2014-07-13
• Attacks a project vigorously — 2012-06-29
• Attacks — 2009-04-12
• Joins the fray — 2004-04-09
• Takes up the challenge — 2002-08-24
• Dives into a project — 2002-01-13
• Dives into a project — 1998-10-03
• Attacks — 1995-02-03