British consul general John Kirk persuaded Sultan Barghash to abolish the slave in 1873 angering natives such as Tippu Tip, who used it as a base for the expansion of his empire near the Lualaba river.
The ruler of Oman, Sa'id ibn Sultan, relocated his capital there in the seventeenth century.  British consul general John Kirk persuaded Sultan Barghash to abolish the slave in 1873 angering natives such as Tippu Tip, who used it as a base for the expansion of his empire near the Lualaba river. Made a British protectorate in 1890, this island regained its independence in 1963. For 10 points, in 1976 what East African island officially united with its mainland neighbor Tanganyika?
The ruler of Oman, Sa'id ibn Sultan, relocated his capital there in the seventeenth century.  
Zanzibar