Former British protectorate. Britain first became involved in Zanzibar in the 19th cent. because the island was one of the main depots for the export of east African slaves. A succession of able British consuls‐general exerted an informal protectorate over the island, and the arrangement was regularized in 1890 when Britain became responsible for the administration of Zanzibar on the sultan's behalf. The slave trade was formally abolished in the sultan's dominions in 1897. Zanzibar became independent in 1963 and joined with Tanganyika to form Tanzania in 1964.
Subjects: African Studies — History.