Historical clue formulations

• México's Tabasco, Jalisco and others — 2026-05-28
• ___ Unidos — 2016-08-07
• Tabasco and Chihuahua, in México — 2015-08-18
• Chihuahua and others — 2010-05-28
• Tabasco and others — 2007-04-08
• Sonora and others — 1999-02-13