Military sexual trauma (MST) is prevalent among female veterans and is associated with deleterious health outcomes. Adaptive coping strategies (e.g., emotional support) are associated with more positive outcomes, while maladaptive strategies (e.g., substance use) are associated with greater impairment. However, research on factors that influence specific coping strategy use is limited. For women with a history of MST, expectancies about the effects of alcohol may enhance the use of maladaptive and reduce the use of adaptive strategies. The present study tested this hypothesis. Associations among MST status and two coping behaviors (emotional support, substance use) in female veterans were examined and the mediating role of positive alcohol expectancies on these relationships was tested. A secondary analysis was conducted using self-report survey data from 186 female veterans in a Northeastern region. Measures included a brief screen for MST, the posttraumatic stress disorder (PTSD) Checklist for DSM-5, the Brief Cope, and the Brief Comprehensive Effects of Alcohol Questionnaire. Among all respondents, positive alcohol expectancies were significantly associated with greater substance use coping, while PTSD symptom severity was negatively associated with emotional support coping. Though women with MST reported greater positive alcohol expectancies and PTSD symptom severity, the direct effects of MST on coping were not significant. Mediation was not supported in our sample. Alcohol expectancies may be a viable target for intervention to reduce alcohol use as a maladaptive coping strategy among female veterans. Similarly, treatment targeting PTSD symptoms, regardless of MST status, is important for enhancing the use of adaptive coping strategies. (PsycInfo Database Record (c) 2024 APA, all rights reserved).