Historical clue formulations

• More than a mere grudge — 2025-04-24
• Literally, "revenge" — 2022-02-13
• Blood feud — 2019-02-12
• Blood feud — 2012-04-19
• Family feud — 2002-10-30
• You may have it against someone — 2000-06-10
• "The Godfather" story line — 1999-10-16