First, to compare the prevalence and intensity of posttraumatic stress disorder (PTSD) among Kuwaiti military men, divided into four groups (50 subjects each) according to degree of exposure to war trauma: (1) the retired (retired before the invasion); (2) an active-in-the-army group (AIA) (involved in duties at the rear only); (3) an in-battle (IB) group (involved in combat); and (4) prisoners of war (POWs-captured during combat). Second, to compare the severity of impact of event, comorbid depression, and anxiety among the groups. Third, to evaluate the contribution of self-esteem and locus of control (LOC). Subjects were interviewed once, 6 years after the war, using: the Clinician Administered PTSD Scale; the Impact of Event Scale (IES); the Hopkins Symptom Checklist-25; the Internal-External LOC; and The Self-Esteem Scale. Subjects were aged 24-71 years (mean 37.9). Sixty-three subjects (31.5%) fulfilled criteria for PTSD, with the rate significantly higher among the POWs (48%) than the retired (24%) and IB (22%), reflecting the severity of IES. Avoidance symptoms were the most pronounced. Self-esteem was significantly lowest among the POWs and those with PTSD. External LOC was associated with PTSD, anxiety, and depression. Self-esteem was the only covariate of PTSD scores. LOC was a significant covariate for anxiety. The characteristics of PTSD in these veterans showed similarity with those from elsewhere. The prominence of self-esteem and avoidance symptoms implies that they should be part of focus for interventions. Focus on LOC should be from the perspective of anxiety.