Marines with Fox Company, 2nd Battalion, 2nd Marine Regiemtn, conducted military operations in urban terrain aboard Camp Lejeune, North Carolina, Aug. 26, 2015. The Marines spent the day practicing basic MOUT skills at both a team and squad-sized level. (U.S. Marine Corps video by Cpl. Preston McDonald/Released)

U.S. Marines with Combat Logistics Battalion 26, 2nd Marine Logistics Group, undergo training at the U.S. Marine Corps Mountain Warfare Training Center (MWTC) Bridgeport, Calif., from Jan. 9 to Feb. 9, 2015. MWTC trains Marines across the warfighting functions for operations in mountainous, high altitude, and cold weather environments in order to enhance a unit’s ability to shoot, move, communicate, sustain and survive in mountainous regions of the world. (U.S. Marine Corps video by Sgt. Anthony L. Ortiz / Released)

Marines and sailors with Combat Logistics Battalion 26, Headquarters Regiment, 2nd Marine Logistics Group, conduct mountain warfare training aboard the U.S. Marine Corps Mountain Warfare Training Center at Bridgeport, California, Jan. 9-Feb. 10, 2015. CLB-26 provided logistical support to 2nd Battalion, 6th Marines, 2nd Marine Division, as they trained to maintain readiness as a self-sustaining unit through mobility and mountain warfare. Includes soundbites from Lt. Col. Daniel Coleman, commanding officer, CLB-26, Sgt. Maj. Phillip Billiot, sergeant major, CLB-26, Sgt. John Nelson, U.S. Marine Corps Mountain Warfare Training Center instructor, and Cpl. Stephen St. Clair, landing support specialist, CLB-26. (U.S. Marine Corps video by Cpl. Kaitlyn Klein/Released)

Corpsmen with Combat Logistics Battalion 26, Headquarters Regiment, 2nd Marine Logistics Group, endure self-induced hypothermia as part of a training exercise aboard U.S. Marine Corps Mountain Warfare Training Center at Bridgeport, California, Jan. 17, 2015. The training highlighted the symptoms of hypothermia, along with treatment and prevention. (U.S. Marine Corps video by Cpl. Kaitlyn Klein/released)

U.S. Marines with 2nd Battalion, 6th Marine Regiment, 2nd Marine Division (MARDIV), conduct training and physical conditioning at Marine Corps Mountain Warfare Training Center (MCMWTC), Bridgeport, Calif., January 9 - February 5, 2015. The MCMWTC consists of cold weather and mountainous environment training where U.S. Marines, Joint, and Allied forces conduct unit and individual training courses to prepare for extreme mountainous conditions. (U.S. Marine Corps video by Lance Cpl. Adam D. Edwards, Combat Camera, 2DMARDIV/Released)