The five-year-old civil war in South Sudan is an unparalleled humanitarian and security crisis, causing the largest exodus of refugees on the African continent since the Rwandan genocide and leaving over a third of the population displaced and two-thirds severely food insecure. Beyond the human toll on South Sudan’s long-suffering citizens, the country’s unraveling underscores the shifting political and security fault lines in the Horn of Africa. This Special Report surveys the region’s various interstate hostilities and intrastate conflicts and suggests ways the United States can reassert its influence to begin contributing meaningfully to the resolution of South Sudan’s civil war and conflicts in the greater Red Sea region.

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