The purpose of this study was to explore the dynamics of South Sudanese crisis from 2013 to 2021. Descriptive research design that anchored on the judgmental sampling technique was adopted. The secondary sources (books, journal articles, conference papers, internet materials and monographs) were sourced from Nigerian libraries and internet, subjected to content analysis, before qualitatively analyzed for the study. Findings revealed that political exclusion, proliferation of small arms and light weapons, corruption and weak institutions triggered grievances that led to December 2013 South Sudanese crisis. The crisis had impacted negatively on security, humanitarian needs, human rights, as well as economy. United Nations Mission in South Sudan, Inter Governmental Authority on Development, African Union Mission in South Sudan, United States, Canada, Uganda, Sudan, Kenya, Ethiopia and Eritrea had intervened. Though these findings have deepened the understanding of Group theory, the fear of South Sudanese crisis reoccurring immediately after general election in 2024 is looming. The study the recommends, rotational presidency, devolution of power, mental disarmament and development assistance to avert the incoming crisis.