Cannabis is now legal for medical use in at least 37 states and the District of Columbia (DC) and for recreational use in 21 states and DC.1 With the gradual expansion of legal access to cannabis over the past 2 decades, the prevalence of cannabis use has increased in both the general population and veterans.1 Although the reported use of cannabis within the past year among US military personnel remains low at less than 1%,2 this low rate is likely attributable to regulations that prohibit its use, with severe penalties (eg, administrative separation and potentially other-than-honorable discharge with reduced benefits) for military personnel.