Upvote:2
It was part of Vichy France. You didn't mention St Pierre and Miquelon. These small islands close to Newfoundland were also under Vichy control, until taken with (very little) force by the Free French. They still are French possessions today.
I don't know when Saint Martin came under Free French control, it must have been before 1943, because in that year crown princess Juliana visited the island. I doubt very much if the heir to the throne would do that, if the other half was under Vichy France control. Saint Martin is also Sint Maarten. The island is shared by France and The Netherlands. It's the only place where those two countries share a common border.
I'm only talking about Saint Martin/Sint Maarten. I assume - but don't know for sure - both islands were under Vichy French control.
Upvote:5
It helps being able to search in French.
From wiki - Histoire_de_Saint-Martin
De juillet 1940 à août 1944: la partie française de Saint-Martin est sous le régime de Vichy et dirigé par gouverneur Constant Sorin en Guadeloupe ; la zone néerlandaise, fidèle à la reine Wilhelmine des Pays-Bas en exil, est associée aux Alliés.
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From July 1940 to August 1944: the French part of Saint-Martin is under the Vichy regime and directed by Governor Constant Sorin in Guadeloupe; the Dutch zone, loyal to Queen Wilhelmina of the Netherlands in exile, is associated with the Allies.