This book presents a comprehensive analysis of regional integration in East Africa in the last century, reflecting the general trends of integration processes in the East Africa sub-region with a focus on the East African Community. Particular attention is paid to the cyclicality of integration dynamics, as well as the analysis of the interconnection and competition between different regional organizations in East Africa. In this context, the specificity of the so-called overlapping membership of African states in regional organizations with similar roles but conflicting treaties and mandates is explored. This situation to a certain extent affects the relations of states in the region with external actors specifically trade negotiations with EU that the book comprehensively analyses. This book therefore offers a deeper understanding of the processes of regional integration in East Africa that had been missed before, which reflects the general integration dynamics on the African continent.