Lance Cpl. Joshua D, Burson, ground radio repair-man, Headquarters and Service Company, 3rd Battalion, 25th Marine Regiment, 4th Marine Division, low crawls during a Marine Corps Martial Arts Program course while at exercise Nordic Frost at Camp Ethan Allen Training Site in Jericho, Vt., Jan. 8. 2017. Marines were provided the opportunity to obtain their grey or green belts during the exercise. (U.S. Marine Corps photo by Cpl. Melissa Martens/ Released) - Lance Cpl. Joshua D, Burson, ground radio repair-man, Headquarters and Service Company, 3rd Battalion, 25th Marine Regiment, 4th Marine Division, low crawls during a Marine Corps Martial Arts Program course while at exercise Nordic Frost at Camp Ethan Allen Training Site in Jericho, Vt., Jan. 8. 2017. Marines were provided the opportunity to obtain their grey or green belts during the exercise. (U.S. Marine Corps photo by Cpl. Melissa Martens/ 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)

Lt. Gen. Richard P. Mills, commander of Marine Forces Reserve, presents a folded flag to the widow of Sgt. Carson Holmquist, a motor transport maintenance chief with Battery M, 3rd Battalion, 14th Marine Regiment, 4th Marine Division, Marine Forces Reserve, during his funeral July 25, 2015 in Grantsburg, Wis. Holmquist, along with three other Marines and a Sailor, was killed in an attack at the Naval Operation Support Center and Marine Corps Reserve Center in Chattanooga, Tenn. on July 16, 2015. Marines, family, friends and the community of Grantsburg gathered to honor the memory and sacrifice of Holmquist and his fallen brothers-in-arms. - Lt. Gen. Richard P. Mills, commander of Marine Forces Reserve, presents a folded flag to the widow of Sgt. Carson Holmquist, a motor transport maintenance chief with Battery M, 3rd Battalion, 14th Marine Regiment, 4th Marine Division, Marine Forces Reserve, during his funeral July 25, 2015 in Grantsburg, Wis. Holmquist, along with three other Marines and a Sailor, was killed in an attack at the Naval Operation Support Center and Marine Corps Reserve Center in Chattanooga, Tenn. on July 16, 2015. Marines, family, friends and the community of Grantsburg gathered to honor the memory and sacrifice of Holmquist and his fallen brothers-in-arms.

Marines, family, friends and community members all gathered together to sing “God Bless America” at Lance Cpl. Squire Wells memorial at Sprayberry High School in Marietta, Georgia, July 21, 2015. Wells was one of the five military members killed by a gunman at the Naval Operational Support Center and Marine Corps Reserve Center in Chattanooga, Tennessee. Those closest to Wells remember him not only as a dedicated Marine but as a young man with contagious enthusiasm and a dedicated loving son. - Marines, family, friends and community members all gathered together to sing “God Bless America” at Lance Cpl. Squire Wells memorial at Sprayberry High School in Marietta, Georgia, July 21, 2015. Wells was one of the five military members killed by a gunman at the Naval Operational Support Center and Marine Corps Reserve Center in Chattanooga, Tennessee. Those closest to Wells remember him not only as a dedicated Marine but as a young man with contagious enthusiasm and a dedicated loving son.

The Marines of Battery M, 3rd Battalion, 14th Marine Regiment pose for a picture with Col. Joseph Russo, commanding officer of 14th Marine Regiment, in front of Schultz’s Battery M monument at Chickamauga and Chattanooga National Military Park in Fort Oglethorpe, Georgia, July 20, 2015. The Marines gathered together at the park to not only honor the Marines and Sailor killed by a gunman at the Naval Operational Support Center and Marine Corps Reserve Center, but to band together as a unit. - The Marines of Battery M, 3rd Battalion, 14th Marine Regiment pose for a picture with Col. Joseph Russo, commanding officer of 14th Marine Regiment, in front of Schultz’s Battery M monument at Chickamauga and Chattanooga National Military Park in Fort Oglethorpe, Georgia, July 20, 2015. The Marines gathered together at the park to not only honor the Marines and Sailor killed by a gunman at the Naval Operational Support Center and Marine Corps Reserve Center, but to band together as a unit.

Marine World War II Veteran, Bill Darling, talks to Sgt. John Stratton and Lance Cpl. Mark Adams with 4th Force Reconnaissance Company, 4th Marine Division during their drill weekend at Fort Hunter Liggett, California, May 02, 2015. During his visit, Darling not only saw the planning, training and execution of the units’ exercise, but he also talked to the Marines, shared stories about his period of service and compared experiences between his time and what the Marines go through today. (Photo courtesy of 4th Force Reconnaissance Company) - Marine World War II Veteran, Bill Darling, talks to Sgt. John Stratton and Lance Cpl. Mark Adams with 4th Force Reconnaissance Company, 4th Marine Division during their drill weekend at Fort Hunter Liggett, California, May 02, 2015. During his visit, Darling not only saw the planning, training and execution of the units’ exercise, but he also talked to the Marines, shared stories about his period of service and compared experiences between his time and what the Marines go through today. (Photo courtesy of 4th Force Reconnaissance Company)

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)

Sgt. Andrew Portell, funeral honors noncommissioned officer-in-charge, 3rd Battalion, 23rd Marine Regiment, is awarded the Navy and Marine Corps Commendation Medal at their home training center in Bridgeton, Mo., Jan 7. Portell received the award for his role in coordinating more than 1,000 funeral honors ceremonies, 623 of which he personally conducted. (U.S. Marine Corps photo by Sgt. Michael Ito) - Sgt. Andrew Portell, funeral honors noncommissioned officer-in-charge, 3rd Battalion, 23rd Marine Regiment, is awarded the Navy and Marine Corps Commendation Medal at their home training center in Bridgeton, Mo., Jan 7. Portell received the award for his role in coordinating more than 1,000 funeral honors ceremonies, 623 of which he personally conducted. (U.S. Marine Corps photo by Sgt. Michael Ito)

Marines from Battery O, 5th Battalion, 14th Marine Regiment, 4th Marine Division prepare to fire artillery rounds from an M777A2 155 mm howitzer at East Fuji Maneuver Area, Japan Sept. 11. Battery O is in Japan as a part of the Unit Deployment Program, a program designed to increase the training level and unit continuity of Marine Corps units stationed in the continental United States. Realistic scenarios and combined exercises are a highlight of the UDP, bringing Marines of many different units together, sometimes with foreign forces. (U.S. Marine Corps photo by Pfc. Terence G. Brady/Released) - Marines from Battery O, 5th Battalion, 14th Marine Regiment, 4th Marine Division prepare to fire artillery rounds from an M777A2 155 mm howitzer at East Fuji Maneuver Area, Japan Sept. 11. Battery O is in Japan as a part of the Unit Deployment Program, a program designed to increase the training level and unit continuity of Marine Corps units stationed in the continental United States. Realistic scenarios and combined exercises are a highlight of the UDP, bringing Marines of many different units together, sometimes with foreign forces. (U.S. Marine Corps photo by Pfc. Terence G. Brady/Released)

2nd Lt. Ben Howarth, 2nd Platoon commander, Company L, 3rd Battalion, 25th Marine Regiment, listens to an Afghan village elder portrayed by a role player during a training mission at Camp Pendleton, Calif., July 30, 2010. 3rd Battalion utilized Afghan role players in a majority of their training exercises during their four month predeployment training at Camp Pendleton. - 2nd Lt. Ben Howarth, 2nd Platoon commander, Company L, 3rd Battalion, 25th Marine Regiment, listens to an Afghan village elder portrayed by a role player during a training mission at Camp Pendleton, Calif., July 30, 2010. 3rd Battalion utilized Afghan role players in a majority of their training exercises during their four month predeployment training at Camp Pendleton.