This memo examines a challenge facing the Revitalized Agreement on the Resolution of the Conflict in South Sudan (R-ARCSS), namely the process of cantonment of large numbers of young men in preparation for either integration into a new national army or becoming the beneficiaries of a disarmament, demobilisation and reintegration (DDR) programme. It uses the framework of the political marketplace. Drawing on the experience of recent peace agreements in South Sudan, it points to the explosive potential of the security arrangements provisions of R-ARCSS as currently implemented