RecruitingBehavioural interventionThe Hastiin Bidziil (Strong Man) InterventionThe Hastiin Bidziil (Strong man) Intervention study is part of a larger project called, Community-Driven Indigenous Research, Cultural Strengths \& Leadership to Advance Equity in Substance Use Outcomes (CIRCLE) Center of Excellence. CIRCLE aims to address drug use related health problems in collaboration with diverse Indigenous communities. This study is a randomized controlled trial study to measure the effectiveness of a secondary prevention program, called Hastiin Bidziil (Strong Man), aimed at reducing substance use among Native American Indian (AI) men ages 18 years and older