The Marines of Battery M, 3rd Battalion, 14th Marine Regiment, Marine Forces Reserve, present the colors during a Purple Heart ceremony held in honor of Gunnery Sgt. Thomas J. Sullivan, Staff Sgt. David Wyatt, Sgt. Carson Holmquist and Lance Cpl. Squire Wells at the Hunter Museum of American Art in Chattanooga, Tenn., April 20, 2016. The Marines were honored for giving their lives to protect others when they were attacked by a gunman at the Naval Operational Support Center and Marine Corps Reserve Center in Chattanooga on July 16, 2015. (U.S. Marine Corps photo by MSgt. John Lee, II / Released) - The Marines of Battery M, 3rd Battalion, 14th Marine Regiment, Marine Forces Reserve, present the colors during a Purple Heart ceremony held in honor of Gunnery Sgt. Thomas J. Sullivan, Staff Sgt. David Wyatt, Sgt. Carson Holmquist and Lance Cpl. Squire Wells at the Hunter Museum of American Art in Chattanooga, Tenn., April 20, 2016. The Marines were honored for giving their lives to protect others when they were attacked by a gunman at the Naval Operational Support Center and Marine Corps Reserve Center in Chattanooga on July 16, 2015. (U.S. Marine Corps photo by MSgt. John Lee, II / Released)

SPRINGFIELD, Mass. – Family and friends of Gunnery Sgt. Thomas J. Sullivan line the streets outside Holy Cross Church in Springfield, Massachusetts, July 27, 2015 during funeral services for Sullivan, who was one of five victims of the Chattanooga, Tennessee shootings July 16, 2015. Along with friends and family, hundreds lined the route of the funeral procession to pay their respects. (U.S. Marine Corps photo by Cpl. J. Gage Karwick/Released) - SPRINGFIELD, Mass. – Family and friends of Gunnery Sgt. Thomas J. Sullivan line the streets outside Holy Cross Church in Springfield, Massachusetts, July 27, 2015 during funeral services for Sullivan, who was one of five victims of the Chattanooga, Tennessee shootings July 16, 2015. Along with friends and family, hundreds lined the route of the funeral procession to pay their respects. (U.S. Marine Corps photo by Cpl. J. Gage Karwick/Released)

Maj. Gen. Paul W. Brier, commanding general of 4th Marine Division, addresses the audience during a Marine Corps birthday ball celebration with 3rd Battalion, 14th Marine Regiment, 4th Marine Division at Adventure Aquarium in Camden, New Jersey, Nov. 15, 2014. Brier spoke on the lineage of the Marine Corps, and 3rd Bn., 14th Marines and the role the battalion has played in the conflicts and wars of its nation. (U.S. Marine Corps Photo by Cpl. J. Gage Karwick/Released) - Maj. Gen. Paul W. Brier, commanding general of 4th Marine Division, addresses the audience during a Marine Corps birthday ball celebration with 3rd Battalion, 14th Marine Regiment, 4th Marine Division at Adventure Aquarium in Camden, New Jersey, Nov. 15, 2014. Brier spoke on the lineage of the Marine Corps, and 3rd Bn., 14th Marines and the role the battalion has played in the conflicts and wars of its nation. (U.S. Marine Corps Photo by Cpl. J. Gage Karwick/Released)

Cpl. Michael Coogan, a field artilleryman and a chief A-gunner with 3rd Battalion, 14th Marine Regiment, 4th Marine Division, rotates the angle of fire on an M777A2 Lightweight Howitzer before firing rounds down range at Fort Indiantown Gap, Pa., during exercise Twisted Sister, a battalion fire exercise, Oct. 25, 2014. Before the batteries can fire, the guns receive coordinates from forward observers down range who are the eyes and ears of the gun batteries. (Marine Corps Photo by Cpl. J. Gage Karwick/Released) - Cpl. Michael Coogan, a field artilleryman and a chief A-gunner with 3rd Battalion, 14th Marine Regiment, 4th Marine Division, rotates the angle of fire on an M777A2 Lightweight Howitzer before firing rounds down range at Fort Indiantown Gap, Pa., during exercise Twisted Sister, a battalion fire exercise, Oct. 25, 2014. Before the batteries can fire, the guns receive coordinates from forward observers down range who are the eyes and ears of the gun batteries. (Marine Corps Photo by Cpl. J. Gage Karwick/Released)

Chaplain Commander Dale Marta of the 14th Marine Regiment, HQ Battery leads a memorial service, in Agadir, Morocco, in honor of those that lost their lives on April 18 at the West Fertilizer Plant. A similar ceremony was held two days prior in honor of the victims of the Boston Marathon bombing. - Chaplain Commander Dale Marta of the 14th Marine Regiment, HQ Battery leads a memorial service, in Agadir, Morocco, in honor of those that lost their lives on April 18 at the West Fertilizer Plant. A similar ceremony was held two days prior in honor of the victims of the Boston Marathon bombing.

Marines assigned to 2nd Battalion, 14th Marine Regiment launch a rocket from a High Mobility Artillery Rocket System here during their Mission Rehearsal Exercise for African Lion 2013. The artillerymen and other troops with 14th Marines performed various live-fire battle drills before the unit deploys to AL-13 in Morocco this spring. This will be the first time the unit will demonstrate both HIMARS and M777 Howitzer capabilities for their Moroccan partners. African Lion is an annual multinational exercise executed under the supervision of Marine Forces Africa Command. (U.S. Marine Corps photo by Sgt. Ray Lewis/Released) - Marines assigned to 2nd Battalion, 14th Marine Regiment launch a rocket from a High Mobility Artillery Rocket System here during their Mission Rehearsal Exercise for African Lion 2013. The artillerymen and other troops with 14th Marines performed various live-fire battle drills before the unit deploys to AL-13 in Morocco this spring. This will be the first time the unit will demonstrate both HIMARS and M777 Howitzer capabilities for their Moroccan partners. African Lion is an annual multinational exercise executed under the supervision of Marine Forces Africa Command. (U.S. Marine Corps photo by Sgt. Ray Lewis/Released)