Lance Cpl. Anthony Sarmiento, a rifleman assigned to Company E, 2nd Battalion, 7th Marine Regiment, 1st Marine Division, provides security while establishing a defensive position during Talon Exercise 1-16 at Marine Corps Air Station, Yuma, Ariz., Oct. 12, 2015. The training took place at Baker’s Peak, a rugged desert training area located on the approximately 1,700,000 acre Barry M. Goldwater Range and was part of a larger event called Talon Exercise, which focused on offensive and defensive operations in desert and urban environments. - Lance Cpl. Anthony Sarmiento, a rifleman assigned to Company E, 2nd Battalion, 7th Marine Regiment, 1st Marine Division, provides security while establishing a defensive position during Talon Exercise 1-16 at Marine Corps Air Station, Yuma, Ariz., Oct. 12, 2015. The training took place at Baker’s Peak, a rugged desert training area located on the approximately 1,700,000 acre Barry M. Goldwater Range and was part of a larger event called Talon Exercise, which focused on offensive and defensive operations in desert and urban environments.

Major Gen. Daniel J. O’Donohue (right), the new commanding general of 1st Marine Division, hands the unit’s colors to Sgt. Maj. William T. Sowers (left), division’s sergeant major, during the change of command ceremony in which Brig. Gen. Daniel D. Yoo passed command to O’Donohue aboard Marine Corps Base Camp Pendleton, Calif., Sept. 10, 2015. O’Donohue is taking command of the division after recently commanding Marine Corps Forces Cyberspace Command. (U.S. Marine Corps photo by Staff Sgt. Bobbie A. Curtis) - Major Gen. Daniel J. O’Donohue (right), the new commanding general of 1st Marine Division, hands the unit’s colors to Sgt. Maj. William T. Sowers (left), division’s sergeant major, during the change of command ceremony in which Brig. Gen. Daniel D. Yoo passed command to O’Donohue aboard Marine Corps Base Camp Pendleton, Calif., Sept. 10, 2015. O’Donohue is taking command of the division after recently commanding Marine Corps Forces Cyberspace Command. (U.S. Marine Corps photo by Staff Sgt. Bobbie A. Curtis)

Marines assigned to Company A, 1st Reconnaissance Battalion, 1st Marine Division, prepare to fast-rope as a fire team aboard Marine Corps Base Camp Pendleton, Calif., Aug. 17, 2015. The Marines practiced fast-roping as a team to gain proficiency in order to effectively insert from a helicopter. - Marines assigned to Company A, 1st Reconnaissance Battalion, 1st Marine Division, prepare to fast-rope as a fire team aboard Marine Corps Base Camp Pendleton, Calif., Aug. 17, 2015. The Marines practiced fast-roping as a team to gain proficiency in order to effectively insert from a helicopter.

Corporal Brady Davenport (left), a fire support man, and 1st Lt. Mark Null (right), an artillery officer, both assigned to 2nd Battalion, 11th Marine Regiment, 1st Marine Divison, observe impacts from M777 Howitizers aboard Marine Corps Base Camp Pendleton, Calif., Aug. 14, 2015. 2/11 annually conducts Summer Fire Exercise to sustain core proficiencies and to further develop their ability to execute fire missions. - Corporal Brady Davenport (left), a fire support man, and 1st Lt. Mark Null (right), an artillery officer, both assigned to 2nd Battalion, 11th Marine Regiment, 1st Marine Divison, observe impacts from M777 Howitizers aboard Marine Corps Base Camp Pendleton, Calif., Aug. 14, 2015. 2/11 annually conducts Summer Fire Exercise to sustain core proficiencies and to further develop their ability to execute fire missions.

Marines with 1st Reconnaissance Battalion, 1st Marine Division, 1st Marine Expeditionary Force, conduct unknown distance shooting during the Pre-Scout Sniper Course aboard Marine Corps Base Camp Pendleton, Calif., July 17, 2015. The six-week long course is designed to prepare and screen students for the follow-on training at Scout Sniper Basic School. (Photo by LCpl. Danielle Rodrigues/Released) - Marines with 1st Reconnaissance Battalion, 1st Marine Division, 1st Marine Expeditionary Force, conduct unknown distance shooting during the Pre-Scout Sniper Course aboard Marine Corps Base Camp Pendleton, Calif., July 17, 2015. The six-week long course is designed to prepare and screen students for the follow-on training at Scout Sniper Basic School. (Photo by LCpl. Danielle Rodrigues/Released)