Historical clue formulations

• Advances — 2024-12-30
• Much-traveled thoroughfares — 2020-03-05
• Significant advances — 2019-11-17
• Headway — 2009-04-18
• Forays — 2007-03-03
• Encroachments — 2000-02-01
• Forays — 1997-11-01
• Encroachments — 1995-02-12
• Advances — 1995-01-21
• Advances — 1994-06-11