This study was designed to investigate the psychological effect of insurgency in the Mizo, caused by the 20 years insurgency in Mizoram. To meet the objectives 200 Mizo participants were randomly selected, who had experienced that stressful situations at different levels of exposures to the stressful episodes. The study examines level of anxiety, depression, anger-hostility, somatic-concern and frustration of the insurgency effected people in Mizoram. It was found that those who had experience combat at first hand and fatal episode were the most vulnerable to psychological problems.