Psychological disorders associated with combat operations among active duty military and police personnel have become one of the most serious issues compelling the increasing attention of scholars in traumatic stress studies, psychology, psychiatry, contemporary medicine, human development, military and police administrators. Most of the research investigation on this insidious mental health crisis has, however, been reported in military populations more than in police personnel. In addition, very few studies have examined the prevalence of post-traumatic stress disorder and depression in Nigeria and the role of combat deployment on the manifestation of PTSD symptoms among personnel of the Nigeria Police Force. The purpose of the current article is to summarize and discuss the current empirical research on the prevalence of PTSD and depression in personnel of Nigeria Police Force, using cohorts from Federal Capital Territory, Abuja (FCT-Abuja); Abia, Benue and Lagos states, Nigeria, who returned from counter terrorism, insurgency operations and other combat duties, and the impact of combat deployment on PTSD symptoms manifestation in the cohort. The article, also, highlights implications of the research findings for psychotherapy as well as recommends a holistic psychological model, the Three-Dimensional Psychological Intervention Strategy (3-DPIS) Model, integrating psychological science, art and culture in psychotherapy, to address the identified mental health crisis
