Marines fall in to formation after a six mile hike at Camp Lejeune, N.C., April 27, 2017. The hike is essential for preparing Marines and Sailors for future combat missions and promotes unit cohesion. The Marines are with II Marine Expeditionary Force Headquarters Group. (Photo by Lance Cpl. Leynard Kyle Plazo) - Marines fall in to formation after a six mile hike at Camp Lejeune, N.C., April 27, 2017. The hike is essential for preparing Marines and Sailors for future combat missions and promotes unit cohesion. The Marines are with II Marine Expeditionary Force Headquarters Group. (Photo by Lance Cpl. Leynard Kyle Plazo)

Major Gen. Brian Beaudreault, commanding general of 2nd Marine Division, gives remarks to Marines and sailors of 2nd CEB upon reaching their new command post at Camp Lejeune, N.C., April 21, 2016. The battalion had occupied their previous location in Hadnot Point since World War II. (U.S. Marine Corps photo by Cpl. Paul S. Martinez/Released) - Major Gen. Brian Beaudreault, commanding general of 2nd Marine Division, gives remarks to Marines and sailors of 2nd CEB upon reaching their new command post at Camp Lejeune, N.C., April 21, 2016. The battalion had occupied their previous location in Hadnot Point since World War II. (U.S. Marine Corps photo by Cpl. Paul S. Martinez/Released)

Marines with 8th Communications Battalion, II Marine Expeditionary Force, participate in a conditioning hike aboard Camp Lejeune, N.C., Sept. 4, 2015. Each Marine carried canned goods for a local homeless shelter during the conditioning hike and dropped them off at a collection point halfway through the march. (U.S. Marine Corps photo by Lance Cpl. Immanuel Johnson/Released) - Marines with 8th Communications Battalion, II Marine Expeditionary Force, participate in a conditioning hike aboard Camp Lejeune, N.C., Sept. 4, 2015. Each Marine carried canned goods for a local homeless shelter during the conditioning hike and dropped them off at a collection point halfway through the march. (U.S. Marine Corps photo by Lance Cpl. Immanuel Johnson/Released)

U.S. Marines with 2nd Intelligence Battalion and British soldiers search for a checkpoint during Exercise Phoenix Odyssey II near Edinburgh, U.K., Oct. 30, 2015. The service members executed a three-mile conditioning hike and shooting competition as part of the exercise, which is designed to enhance joint intelligence operations. (U.S. Marines Corps photo by Cpl. Lucas Hopkins/Released) - U.S. Marines with 2nd Intelligence Battalion and British soldiers search for a checkpoint during Exercise Phoenix Odyssey II near Edinburgh, U.K., Oct. 30, 2015. The service members executed a three-mile conditioning hike and shooting competition as part of the exercise, which is designed to enhance joint intelligence operations. (U.S. Marines Corps photo by Cpl. Lucas Hopkins/Released)