The percentage increase between 2017 and 2018 of soldiers testing positive for THC at "nine Army bases in or near marijuana-friendly states," according to a recent article in the military-focused online publication, Task & Purpose. "For comparison, there has been a 5% increase in soldiers testing positive for THC across the entire Army." THC (tetrahydrocannabinol) is "the principal psychoactive component in cannabis." According to the article:
This data comes from the "Army Crime Report for Fiscal Year 2018, a non-public document published in Sept. that highlights criminal activity in the service and gives commanders' tips on how to address it."
After looking to those nine bases and seeing a marked increase in pot use among soldiers, the Army concluded that "ready access, social acceptance, and removal of the barrier of locating and working with a 'drug dealer' is having an impact on Army law enforcement," according to the report, adding that civilians entering bases are "more likely" to be found with drug paraphernalia, despite it being against federal law.