Marines with 3rd Battalion, 4th Marines, 7th Marine Regiment, learn about patrolling techniques during the Tactical Small Unit Leaders’ Course held aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., July 14, 2016. (Official Marine Corps photo by Cpl. Thomas Mudd/Released) - Marines with 3rd Battalion, 4th Marines, 7th Marine Regiment, learn about patrolling techniques during the Tactical Small Unit Leaders’ Course held aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., July 14, 2016. (Official Marine Corps photo by Cpl. Thomas Mudd/Released)