Lance Cpl. Matthew Ritter, a heavy equipment operator with Bulk Fuel Company, 7th Engineer Support Battalion, shows a couple a weapons system during San Diego Fleet Week 2015 aboard Naval Base Coronado, Calif., Sept. 20, 2015. Thirty-seven Marines from 7th ESB presented static displays during the event to demonstrate the quality of military assets to the citizens of San Diego. (U.S. Marine Corps photo by Sgt. Laura Gauna/released) - Lance Cpl. Matthew Ritter, a heavy equipment operator with Bulk Fuel Company, 7th Engineer Support Battalion, shows a couple a weapons system during San Diego Fleet Week 2015 aboard Naval Base Coronado, Calif., Sept. 20, 2015. Thirty-seven Marines from 7th ESB presented static displays during the event to demonstrate the quality of military assets to the citizens of San Diego. (U.S. Marine Corps photo by Sgt. Laura Gauna/released)

MARINE CORPS BASE CAMP PENDLETON, Calif. - Staff Sgt. Albert Macklin, a battery local security chief with Battery Q, 5th Battalion, 11th Marine Regiment, I Marine Expeditionary Force and New Orleans native, helps coordinate 360-degree security during Spring Fire Exercise at Camp Pendleton March 31, 2016. During the combined-arms training exercise, Macklin and other Marines helped coordinate where all security posts were, along with securing the various parts of the range in accordance with where the battery was firing. (U.S. Marine Corps Photo by Cpl. Demetrius Morgan/RELEASED) - MARINE CORPS BASE CAMP PENDLETON, Calif. - Staff Sgt. Albert Macklin, a battery local security chief with Battery Q, 5th Battalion, 11th Marine Regiment, I Marine Expeditionary Force and New Orleans native, helps coordinate 360-degree security during Spring Fire Exercise at Camp Pendleton March 31, 2016. During the combined-arms training exercise, Macklin and other Marines helped coordinate where all security posts were, along with securing the various parts of the range in accordance with where the battery was firing. (U.S. Marine Corps Photo by Cpl. Demetrius Morgan/RELEASED)

Marines coordinate fires for High Mobility Artillery Rocket System during an M142 HIMARS live fire exercise at Camp Pendleton March 16, 2016. During the exercise, Marines coordinated fires based on hypothetical combat situations they might encounter while deployed. The HIMARS rounds are aided by Global Positioning System (GPS) technology and can travel to altitudes up to 75 kilometers and can precisely engage targets up to 40 miles away. The Marines are with Battery S, 5th Battalion, 11th Marine Regiment, 1st Marine Division, I Marine Expeditionary Force. - Marines coordinate fires for High Mobility Artillery Rocket System during an M142 HIMARS live fire exercise at Camp Pendleton March 16, 2016. During the exercise, Marines coordinated fires based on hypothetical combat situations they might encounter while deployed. The HIMARS rounds are aided by Global Positioning System (GPS) technology and can travel to altitudes up to 75 kilometers and can precisely engage targets up to 40 miles away. The Marines are with Battery S, 5th Battalion, 11th Marine Regiment, 1st Marine Division, I Marine Expeditionary Force.

Lance Cpl. Faustino J. Camilo prepares to load a M231 primer into the M777 Howitzer cannon during a battery-level fire exercise at Camp Pendleton, Calif., Feb. 10, 2016. The battery participated in a fire exercise in preparation for their upcoming deployment with the 31st Marine Expeditionary Unit. This exercise was the first time the battery used the Digital Firing Control System, a computer that shows grid coordinates of targets and accompanying information. This system is important because it provides a faster response time than using iron sights to fire the howitzer. Camilo, from Brunswick, Ga., is an artillery cannoneer with Battery F, 2nd Battalion, 11th Marine Regiment, 1st Marine Division. (U.S. Marine Corps Photo by Lance Cpl. Justin E. Bowles) - Lance Cpl. Faustino J. Camilo prepares to load a M231 primer into the M777 Howitzer cannon during a battery-level fire exercise at Camp Pendleton, Calif., Feb. 10, 2016. The battery participated in a fire exercise in preparation for their upcoming deployment with the 31st Marine Expeditionary Unit. This exercise was the first time the battery used the Digital Firing Control System, a computer that shows grid coordinates of targets and accompanying information. This system is important because it provides a faster response time than using iron sights to fire the howitzer. Camilo, from Brunswick, Ga., is an artillery cannoneer with Battery F, 2nd Battalion, 11th Marine Regiment, 1st Marine Division. (U.S. Marine Corps Photo by Lance Cpl. Justin E. Bowles)

Marines with Battery I, 3rd Battalion, 11th Marine Regiment, 1st Marine Division, fire an M777 Howitzer¬ during the opening day of live-fire operations for Steel Knight at Marine Corps Air Ground Combat Center Twentynine Palms, California, on Dec. 10, 2015. The tough, realistic training is intended to develop combat skills necessary to operate as the ground combat element of the I Marine Expeditionary Force. - Marines with Battery I, 3rd Battalion, 11th Marine Regiment, 1st Marine Division, fire an M777 Howitzer¬ during the opening day of live-fire operations for Steel Knight at Marine Corps Air Ground Combat Center Twentynine Palms, California, on Dec. 10, 2015. The tough, realistic training is intended to develop combat skills necessary to operate as the ground combat element of the I Marine Expeditionary Force.