Coordinates: 14°N 61°W
Martinique is an island in the Lesser Antilles in the Caribbean Sea. Columbus charted the island but the Spanish weren't interested. The French colonized the island in the mid-1600s, but, was taken by the British about 1794 and was returned to France after the Napoleonic Wars.
In the novel Lieutenant Hornblower, after the gun empacement on the Scotchman's Bay, Santo Domingo, was taken by HMS Renown, Captain James Sawyer commanding, Hornblower, while observing raiding ships trapped in the bay that they could harass shipping in the area bound for Martinique.
Lieutenant Hornblower (mentioned only)
Martinique at Wikipedia.