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Tristan da Cunha is a group of remote islands in the south Atlantic Ocean and also the name of its main island.
Politically, Tristan da Cunha, together with the Gough Island, which is located 395 km away from the group, is a dependency of St.
In 1815 the British formally annexed the islands; this is reported to have primarily been a measure to ensure that the French would not be able to use the islands as a base for a rescue operation to free Napoleon Bonaparte from his prison on St Helena.