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When did Anguilla become a separate dependent territory of the United Kingdom?

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Anguilla formally became a separate dependent territory of the United Kingdom in 1980.1

Prior to this, the island had been part of an associated state with Saint Kitts and Nevis beginning in 1967, an arrangement that faced significant local opposition. Following the intervention of British troops in 1969 and the subsequent Anguilla Act of 1971, which placed the island under direct British control, the 1980 designation solidified its status as a separate territory.1