Specific Aims: The primary aim of the proposed study is to assess the efficacy of PST for positively impacting distressed military family caregiver's burden, and depression levels, ultimately enhancing their mental health QOL (primary outcomes). Data will also be collected to characterize physical and social stressors for these caregivers such as illness that limits the caregiver's activities, new household management and caregiving responsibilities, satisfaction with social roles and activities, lifestyle constraints, the quality of the marital relationship, perceived social support, and demographic factors. A secondary aim of the proposed study is to determine which of a series of key caregiver sociodemographic factors moderate PST- intervention efficacy for caregiving burden and mental health QOL outcomes.