--- - |2+ Abstract Objective Service members deployed to war are at risk for moral injury, but the potential sources of moral injury are poorly understood. The aim of this qualitative study was to explore the types of events that veterans perceive as morally injurious and to use those events to develop a categorization scheme for combat‐related morally injurious events. Method Six focus groups with US war veterans were conducted. Results Analysis based on Grounded Theory yielded two categories (and eight subcategories) of events that putatively cause moral injury. The two categories were defined by the focal attribution of responsibility for the event: Personal Responsibility (veteran's reported distress is related to his own behavior) versus Responsibility of Others (veteran's distress is related to actions taken by others). Examples of each type of morally injurious event are provided. Conclusions Implications for the further development of the moral injury construct and treatment are discussed. - Journal of Clinical Psychology, EarlyView.