Historical clue formulations

• Country with a 75-mile coast along the Gulf of Guinea — 2025-03-07
• Porto-Novo's country — 2024-04-26
• Home of the Kingdom of Dahomey, today — 2023-12-23
• Hippie happening — 2021-08-26
• Land between Togo and Nigeria — 2021-04-04
• Country between Togo and Nigeria — 2019-09-02
• Country whose largest city is Cotonou — 2015-02-20
• Neighbor of Niger — 2012-11-25
• Neighbor of Nigeria and Togo — 2010-11-07
• Nation once known as Dahomey — 2009-01-27
• Its capital is Porto-Novo — 2007-08-04
• Dahomey, since 1975 — 2006-05-20
• Neighbor of Togo — 2004-06-27
• Neighbor of Nigeria — 2003-12-20
• Niger neighbor — 2003-07-23
• Neighbor of Nigeria — 2002-07-28
• Neighbor of Nigeria — 1999-02-15
• African republic — 1998-01-26
• Neighbor of Nigeria — 1995-01-27
• Nigeria neighbor — 1994-06-24