The study is a randomized clinical trial involving 384 female veterans and active duty personnel in 11 VA medical centers and 1 DoD medical center. All subjects, even self-referrals, will enter the study through referrals by mental health clinicians at the participating sites. Following informed consent, subjects will be screened for inclusion and exclusion diagnoses. If they meet these criteria and agree to participate, they will be randomly assigned to one of the two treatments, which will occur weekly for 10 weeks. Subjects will be assessed before treatment, immediately following treatment, and 3 and 6 months after the end of treatment. The primary outcome is PTSD severity. Secondary outcomes are anxiety and depression. Exploratory outcomes include associated features of PTSD, such as dissociation and substance abuse; psychosocial functioning, quality of life, physical health, satisfaction with treatment, and service utilization. Both treatments will be described in detail in a treatment manual and monitored intensively to ensure that they are administered correctly.