Through transfers and deployments, military-affiliated gang members expand their culture and operations to new regions nationwide and worldwide, undermining security and law enforcement efforts to combat crime. Gang members with military training pose a unique threat to law enforcement personnel because of their distinctive weapons and combat training skills and their ability to transfer these skills to fellow gang members.

Many street gang members join the military to escape the gang lifestyle or as an alternative to incarceration, but often revert back to their gang associations once they encounter other gang members in the military. Other gangs target the U.S. military and defense systems to expand their territory, facilitate criminal activity such as weapons and drug trafficking, or to receive weapons and combat training that they may transfer back to their gang. Incidents of weapons theft and trafficking may have a negative impact on public safety or pose a threat to law enforcement officials.