Historical clue formulations

• What friendly opponents may do — 2022-02-11
• Continue cordially despite differences — 2011-09-02
• Not completely settle an argument [New York] — 2009-05-03
• Realize there will be no resolution — 2006-02-18
• Simply stop arguing — 2005-05-20
• Leave a dispute unsettled — 2004-12-31
• Leave things unresolved, perhaps — 2001-06-22
• Leave an argument unresolved, say — 1998-11-20
• Differ amicably — 1995-06-09