Background: Stress sensitization, i.e., increased responsiveness to stressful life events has been found in high trauma exposed adults within the first 18 months following trauma exposure (Smid et al., 2012) as well as in young children (Grasso, Ford, & Briggs-Gowan, 2012). However, it is unclear whether stress sensitization may persist over time. We hypothesized that soldiers exposed to high levels of early life trauma would be at risk of persistence of stress sensitization 2 years following deployment.