Africa still faces numerous security issues that continue to challenge its political viability, stability, prosperity and sustainable peace. This monograph attempts to uncover the complexity of the most salient security issues facing the Horn of Africa. It provides in-depth analysis on intra-state conflicts and insurgencies and their consequences on and beyond the region. It also investigates the root causes of several inter-state conflicts in the Horn of Africa as well as the possibilities of their effective management. The monograph also assesses the performance of the Inter-Governmental Authority on Development in terms of its contribution to regional security, as well as the involvement of the African Union in the region.