This article examines Rebel Governance Legacies and Post-Conflict State Formation in South Sudan with a focused emphasis on South Sudan within the field of Political Science. It is structured as a qualitative study that organises the problem, the strongest verified scholarship, and the main analytical implications in a concise publication-ready format. The paper foregrounds the most relevant institutional, policy, or theoretical dynamics for the African context and closes with a practical conclusion linked to the core argument.