Although military personnel are trained for combat and peacekeeping operations, accumulating evidence indicates that deployment-related exposure to stress events is associated with mental health problems and suicidal behaviour. Suicide accounted for substantial mortality among army personal and veterans. This data could be partially explained with observation that war-zone exposures may have considerable negative emotional or behaviour consequences. On the other hand, it is also well known that some personal characteristics as impulsivity and aggression could be connected with higher suicide risk. The extent to which violent and aggressive behaviour in the aftermath of deployment can be attributed to combat experience remains an area of debate and ongoing investigation. The aim of our study was to evaluate negative life events of suicide victims in a month before suicide. On the other hand, aggression and impulsivity of suicide victims was evaluated. In the three-year period, 90 suicide victims (28 women and 62 men) in the central region of Slovenia were examined using the method of psychological autopsy performed by specially designed questionnaire and from medical documentation. We compared a subgroup of suicide victims with previous aggressive behaviour and a subgroup of suicide victims without any previous reported aggressive behaviour. We observed that suicide victims with previous aggressive behaviour have higher a number of negative life events in the month before suicide and have higher impulsivity then others. We also observed that suicide victims with previous aggressive behaviour directed toward others have more often previous suicide attempts than suicide victims without previous aggressive behaviour. It could be concluded that negative life events of suicide victims with previous experience of aggressive behaviour may additionally contribute to increased suicide risk. In military environments, attention should be paid to such vulnerable individuals, especially during pre-deployment periods.