History of Zanzibar led to the Anglo-Zanzibar War, also known as the shortest war in history. The islands gained independence from Britain in December 1963 as a constitutional monarchy. A month later, the bloody Zanzibar Revolution, in which several thousand Arabs and Indians were killed and thousands more expelled and expropriated, led to the Republic of Zanzibar and Pemba. That April, the republic merged with the mainland Tanganyika, or more accurately, was subsumed into Tanzania, of which Zanzibar remains a semi-autonomous region. Zanzibar was most recently in the international news with a January 2001 massacre, following contested elections. Zanzibar has been inhabited, perhaps
Zanzibar in July. The main island of Zanzibar, Unguja, has a fauna reflecting its connection to the African mainland during the last Ice Age. Endemic mammals with continental relatives include the Zanzibar red colobus ("Procolobus kirkii"), one of Africa's rarest primates, with perhaps only 1,500 existing. Isolated on this island for at least 1,000 years, this colobus is recognized as a distinct species, with different coat patterns, calls, and food habits from related colobus species on the mainland. The Zanzibar red colobus lives in a wide variety of drier areas of coastal thickets and coral rag scrub, as well as mangrove