The literature on the association between deployment to a peacekeeping mission & distress, mental disorders, & suicide was systematically reviewed. 68 articles are included in the review. Some studies have found higher levels of postdeployment distress & posttraumatic stress disorder symptoms. Most studies have not shown an increased risk of suicide in former peacekeepers. As postdeployment distress is consistently shown to be associated with high levels of exposure to combat during deployment, targeted interventions for peacekeepers who have been exposed to high levels of combat should be considered. (91 refs.) JA