Experience of serious violations of International Humanitarian Law (IHL) results in complex physical disability and psychosocial trauma amplifying poverty and multi-generational trauma and impeding long-term recovery. We use data from a representative sample of victims in the caseProsecutor V. Dominic Ongwenbrought before the International Criminal Court. Thirteen years after the 2004 massacre, the victims were significantly worse off than the general war-affected population that did not experience serious violations of IHL. The differences in health and wellbeing persisted for individuals and their households, including children born after the massacre. The victims have significantly lower availability of appropriate health services and medications, including significantly greater distance to travel to these services. These findings call attention to the needs of people having experienced IHL violations, for provision of physical and emotional trauma care to allow for recovery, and better understanding of the short- and long-term impacts of IHL violations.Supplementary InformationThe online version contains supplementary material available at 10.1057/s41271-023-00407-8.