This study examines how different types of external support provided during intrastate conflicts influence the likelihood of conflict recurrence. Building on existing literature, it proposes that external support types associated with direct military capabilities - such as troop deployments, weapons, and ammunition - are more likely to facilitate remobilisation and heighten expectations of renewed support, thereby increasing the risk of conflict recurrence in the short term. To test this hypothesis, the study employs a Cox proportional hazards model. The analysis is conducted on a dataset capturing 6,027 dyad peace-year observations from 1975 to 2015. It examines eight types of external support provided to governments and rebel groups. The findings of this study are inconclusive, as the analysis does not yield statistically significant effects for the main variables of interest. The study contributes to the literature through theory development and addresses a critical research gap regarding the effects of different external support types. The inconclusive result highlights the need for more nuanced data and comprehensive analytical frameworks to deepen our understanding of how external interventions shape the prospects for sustainable peace.