Marines with 8th Communication Battalion, II Marine Expeditionary Force, work as a team to perform log curls as part of their battle event during the unit’s Marine Corps martial arts program instructor course held aboard Marine Corps Base Camp Lejeune, N.C., Oct. 2, 2014. The battle event was the final challenge for students, testing their martial arts skills, physical endurance and capacity to lead. Students also performed a green belt evaluation that tests Marines on all of their green belt techniques as part of the culminating event. (U.S. Marine Corps photo by Cpl. James R. Smith/Released)