U.S. Marines with 1st Marine Regiment case the units battle colors during a ceremony aboard Camp Leatherneck, Helmand province, Afghanistan, August 15, 2014. 1st Battalion, 2nd Marine Regiment assumed the security mission of Camp Bastion and Camp Leatherneck as the ceremony aboard Camp Leatherneck formally concludes 1st Marine Regiments mission in Regional Command (Southwest). (Official U. S. Marine Corps photo by Sgt. Dustin D. March/Released)