This paper examines the relationship between the political system of Rivers State (Nigeria) and prospects for sustainable peace, using the March 18, 2025 state of emergency declaration as a focused case study. Drawing on primary news reports, academic literature on Niger Delta politics, human-rights documentation, and governance theory, the study situates the 2025 federal intervention within the longer history of political contestation, resource-related violence, and institutional fragility in Rivers State. It asks: (1) What structural features of Rivers State’s political system predispose it to instability? (2) How did the 2025 state of emergency unfold, what were its stated justifications and immediate effects, and how did it affect governance and peace? (3) What are the implications of such federal emergency interventions for sustainable peace-building in oil-rich subnational contexts? The paper argues that while emergency measures can produce short-term order, they risk undermining democratic legitimacy, local accountability, and long-term conflict transformation unless paired with inclusive political reforms and community-centered peacebuilding. Recommendations include legal and institutional safeguards for emergency powers, mechanisms to restore and strengthen local democratic institutions after emergencies, and targeted socio-economic and environmental remediation programs for affected communities.