Substance use is pervasive among United States military veterans. According to the 2018 National Survey on Drug Use and Health (NSDUH), 3.7 million military veterans were diagnosed with a substance use disorder (SUD), with 80.2% reporting alcohol misuse, 26.7% reporting illicit drug use and 7% reporting both illicit drug use and alcohol misuse (National Institute on Drug Abuse, 2020). Within a military context, substance use may increase within specific contexts, such as increased illicit drug use upon discharge from active duty military service (as use during service is not tolerated; Seal et al., 2011). In addition, prior research found that