5/ in the late 1950s-early 1960s there was a short-lived effort to unite all the various π¬π§ British Caribbean territories into the "West Indies Federation" which it was hoped would become independent as a single state
https://en.wikipedia.org/wiki/West_Indies_Federation
However the group could not agree how it would be governed or function viably and was eventually abandoned
6/ Moving on we have the case of Saint-Martin/Sint Maarten.
Saint-Martin is part of France π«π·. Sint Maarten πΈπ½ is a "constituent country" of the the Kingdom of the Netherlands π³π±, as are Aruba π¦πΌ and CuraΓ§ao π¨πΌ in the Leeward Antilles.
https://en.wikipedia.org/wiki/Collectivity_of_Saint_Martin
https://en.wikipedia.org/wiki/Sint_Maarten
#geoweirdness