RecruitingBehavioural interventionEvaluation of a Group-based, Skills Training for Increasing Mental ToughnessThe goal of the Life Force study is to (1) evaluate the efficacy of targeted, skills-based training for enhancing mental toughness and mitigating harmful and high-risk behaviors in active-duty Soldiers, and (2) to determine who benefits the most from this type of training. Researchers will compare the training group to a control group. All participants will complete a baseline survey and two follow up surveys at 6 and 12 months post-baseline. The group assigned to the Life Force training condition will also complete a 5-session, group-based, skills training program.