Previous research had shown that more than 45% of war veterans with PTSD meet the criteria for a single PD, while about 16% of veterans have 2 or more PDs. In 2013, APA released DSM-5, proposing a new, alternative PD model for the DSM-5. The criteria for PD according to this model are personality dysfunction and the presence of pathological personality traits that are examined using the PID-5 inventory. Pathological personality traits are negative affect, detachment, antagonism, disinhibition and psychoticism. This model hasn't yet been studied in the population of Croatian war veterans with PTSD. In a study conducted in KBC Rijeka on a sample of 31 veterans with PTSD, we examined personality traits using PID-5. We compared the results with a study conducted on American war veterans with and without PTSD (James LM et al.) and confirmed that war veterans with PTSD exhibit a higher degree of personality pathology and elevated values in all personality traits. Negative affectivity, separation and psychoticism are particularly elevated in Croatian war veterans, while American war veterans have lower values for negative affect but higher values in the domain of disinhibition. By studying the proportions of personality traits in the overall personality, negative affectivity, detachment, psychoticism, disinhibition and antagonism were expressed in that order, while in veterans without PTSD, disinhibition and antagonism have higher proportions. Negative affectivity and separation are primarily internalizing domains and therefore we conclude that Croatian war veterans with PTSD are more likely to have comorbidity with internalizing mental disorders (depression) and a higher frequency of avoidant, obsessive-compulsive and schizotypal PD. The alternative PD model provides an opportunity for a better, individual approach to the patient and for understanding and treating the comorbidities present, which applies not only to PL but to all psychiatric disorders.