the zanzibar revolution Change_of_leadership ( `` thawra unk '' ) occurred Coming_to_be in 1964 and led to Causation the overthrow Change_of_leadership of the sultan of zanzibar and his mainly arab government by local african revolutionaries .

the zanzibar revolution Change_of_leadership ( `` thawra unk '' ) occurred Coming_to_be in 1964 and led to Causation the overthrow Change_of_leadership of the sultan of zanzibar and his mainly arab government by local african revolutionaries .

frustrated Hindering by under-representation in parliament despite winning 54 % of the vote in the july 1963 election Choosing , the mainly african unk party Social_event ( asp ) allied Collaboration itself with the left-wing umma party Social_event , and early in the morning of 12 january 1964 asp member john okello mobilised around unk revolutionaries on the main island of unguja ( zanzibar island ) .