Africa Report N°236. The formation of a transitional government following Riek Machar’s return to Juba in April marked the most significant milestone of the August 2015 Agreement on the Resolution of the Conflict in the Republic of South Sudan (ARCSS) that ended the twenty-month civil war. Yet the ARCSS, designed to address a war primarily fought between the government and the Sudan People’s Liberation Movement/Army-In Opposition (SPLM/A-IO) in the Greater Upper Nile region, is an imperfect solution to other conflict fault lines, notably in the Equatoria region. Conflicts there are driven by a combination of national governance issues – federalism, security sector reform and a new constitution – that the ARCSS addresses – and localised grievances. Though the Equatorian conflicts appear to be on the wane, the agreement’s ability to address national political and security governance issues as well as regional-specific questions about the status of Equatorian opposition forces will determine if they revive.