Abdalla, Moh’d Juma2019-11-272020-01-072019-11-272020-01-072010Abdalla, M. J. (2010) The union between Tanganyika and Zanzibar: the challenges facing its sustainability, Master dissertation, University of Dar es Salaam, Dar es Salaamhttp://localhost:8080/xmlui/handle/123456789/2902Available in print form, East Africana Collection, Dr. Wilbert Chagula Library, Class mark (THS EAF JQ3513.T34A22)The Union between Tanganyika and Zanzibar is perceived as one of the most successful Unions in Africa. With over 46 years of existence, the Union has been facing many challenges that seriously affect its sustainability. The Union has survived four decades of mistrust and suspicions. Yet, many studies conducted on the field of the Union, have found that very little is known about the factors behind the survival of Union. Despite the on going challenges facing the union, it has managed to survive for four decades, making it one of the longest sustained Union in Africa. The focus of this study therefore is to answer the puzzle why has the Union between Tanganyika and Zanzibar survived for more than forty years amidst challenges that threaten its survival? This study uses interviews and documentary reviews to investigate the factors behind the sustainability of the Union. The findings from this study have revealed that there are two main factors that contribute to the sustainability of the Union. These factors are the legal regime of the Union, and interests of political leadership in power. The findings have shown that citizens at large have a minimal role in the sustainability of the Union between Tanganyika and Zanzibar. The study makes a key conclusion that, the leaders’ interests are central to the sustainability of the Union. It is the leaders who have instituted the legal regime that protect their interests in the Union. Based on the findings, the study recommends that in order to enhance the future sustainability of the union, citizens should have a role to play. As findings demonstrated, the union based on leaders’ interests creates problems which affect the smooth running of the union. The study equally recommends further study on the role of citizens in relation to the sustainability of the Union.enUnion of Tanganyika and ZanzibarChallengesThesis