St. Christopher-Nevis-Anguilla was historically an overseas territory of the United Kingdom located in the Caribbean Sea. This entity later became a province to the short lived West Indies Federation in 1958. When the regional federation of British islands collapsed in 1962, Saint Christopher-Nevis-Anguilla became involved in several attempts by movements towards another union in the Caribbean region.

In 1967, the territory of Saint Christopher-Nevis-Anguilla was granted full internal autonomy. In 1971, the island of Anguilla rigorously sought and achieved separation; in 1980, the separation from the Federation of Saint Kitts and Nevis was formally accepted. The remaining state became the independent country of Saint Kitts and Nevis in 1983, and Anguilla still today remains a British overseas territory.

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