Psychological traumatization of the personnel of the National Guard of Ukraine’s shall be studіed because of the antiterrorist operation taking place in the Eastern Ukraine, which, as for its full scale and human losses, equates to a real war. We found out that participants in combat actions suffer various forms of maladaptation, which disturb their somatic, psychological and social functioning. We used a set of psych diagnostic techniques to determine the peculiarities of military members’ adaptation to stressful conditions, and the cluster analysis procedure to generalize the data. In the first group, almost all indicators of adaptability were diagnosed as having «normal» level of stress without a threat to an individual; but when chronic occurrence happens, it could have negative consequences for the military personnel mentality. Namely, the high ability to predict negative effects of events and the critical attitude to own capabilities multiplied by the strategy of predicted danger avoiding provides lessening of personal traumatic experience in the current situation, reduces the probability of post-traumatic stress disorder (PTSD) – «alarming, predicting a hazard». The second group is characterized by some «underestimation» of dangers from events that they are experiencing. In this group, indicators of acute stress disorder are severe, compared to PTSD indicators. However, despite the acquired PTSD features, the experiences events did not change their overall attitude to the surrounding world, which they continue to perceive as dangerous and threatening – «open to the outside world (and a danger)». Representatives of the third group show all the signs of acute stress disorder and PTSD, the critical tension of adaptive abilities. The military members of this group tend to call empathy, justify their behavior by known information on stress and PTSD – «victimhood, taking the role of a victim». The representatives of the fourth group are characterized by a demonstration of the complete lack of signs of acute stress disorder and PTSD, and by the high level of their own adaptive abilities. Representatives of this group, aware of their own anxiety, try to hide it from others, compensate it by the excess bravado – «displacing, concealing own fear». Therefore, among the military members, there are four types of adaptations to stressful conditions: «predictive danger», «open danger», «taking the role of victim», «concealing own fear».