Photo of the USS Constitution provided by Associated Press. - Photo of the USS Constitution provided by Associated Press.

U.S. Marine Corps Lance Cpl. Tyler Varias, a mortar man, with Weapons Company, 1st Battalion, 25th Marine Regiment, 4th Marine Division, Marine Forces Reserve, participates in Exercise Northern Strike 17 at Camp Grayling Joint Maneuver Combat Center, Michigan from July 29 to Aug. 12, 2017. Exercise Northern Strike is a National Guard Bureau-sponsored training exercise that unites service members from multiple branches, states and coalition countries to conduct combined ground and air combat operations. (U.S. Marine Corps photo by Lance Cpl. Imari J. Dubose/Released). - U.S. Marine Corps Lance Cpl. Tyler Varias, a mortar man, with Weapons Company, 1st Battalion, 25th Marine Regiment, 4th Marine Division, Marine Forces Reserve, participates in Exercise Northern Strike 17 at Camp Grayling Joint Maneuver Combat Center, Michigan from July 29 to Aug. 12, 2017. Exercise Northern Strike is a National Guard Bureau-sponsored training exercise that unites service members from multiple branches, states and coalition countries to conduct combined ground and air combat operations. (U.S. Marine Corps photo by Lance Cpl. Imari J. Dubose/Released).

TIFNIT, Morocco - Multinational platoons consisting of personnel from the Moroccan Armed Forces, U.S. Marines and U.S. Army practice riot-control techniques at the training area in Tifnit, Morocco during Exercise African Lion 2017. African Lion is a combined, multilateral exercise designed to improve interoperability and mutual understanding of each nation’s tactics, techniques and procedures while demonstrating the strong bond between the nation’s militaries. (Photo by Thomas Flatley) - TIFNIT, Morocco - Multinational platoons consisting of personnel from the Moroccan Armed Forces, U.S. Marines and U.S. Army practice riot-control techniques at the training area in Tifnit, Morocco during Exercise African Lion 2017. African Lion is a combined, multilateral exercise designed to improve interoperability and mutual understanding of each nation’s tactics, techniques and procedures while demonstrating the strong bond between the nation’s militaries. (Photo by Thomas Flatley)

Lance Cpl. Scott Kesler, a rifleman with Company C, 1st Battalion, 25th Marines, 4th Marine Division, poses for a photo during exercise Riley Xanten in Ontario, Canada, Feb. 6, 2017. Kesler and his fellow Marines joined soldiers with the Royal Hamilton Light Infantry, Wentworth Regiment, Canadian Armed Forces, to train in an arctic environment and exchange knowledge on cold weather tactics, survival skills, shelter building, ice fishing, and more. (U.S. Marine Corps photo by Sgt. Sara Graham/released) - Lance Cpl. Scott Kesler, a rifleman with Company C, 1st Battalion, 25th Marines, 4th Marine Division, poses for a photo during exercise Riley Xanten in Ontario, Canada, Feb. 6, 2017. Kesler and his fellow Marines joined soldiers with the Royal Hamilton Light Infantry, Wentworth Regiment, Canadian Armed Forces, to train in an arctic environment and exchange knowledge on cold weather tactics, survival skills, shelter building, ice fishing, and more. (U.S. Marine Corps photo by Sgt. Sara Graham/released)

Cpl. Tevfik Ozkaynak (left), a rifleman with Company C, 1st Battalion, 25th Marine Regiment, 4th Marine Division and Sgt. Lee Gugino (right), a squad leader, observe objective points on a map while on a reconnaissance patrol during exercise Riley Xanten II, in Burwash, Ontario, Feb. 3-5, 2017. During the exercise, the Marines joined soldiers from the Canadian Armed Forces to exchange knowledge and increase proficiency in cold weather tactics, survival skills, shelter building, ice fishing, and more. (U.S. Marine Corps photo by Sgt. Sara Graham/released) - Cpl. Tevfik Ozkaynak (left), a rifleman with Company C, 1st Battalion, 25th Marine Regiment, 4th Marine Division and Sgt. Lee Gugino (right), a squad leader, observe objective points on a map while on a reconnaissance patrol during exercise Riley Xanten II, in Burwash, Ontario, Feb. 3-5, 2017. During the exercise, the Marines joined soldiers from the Canadian Armed Forces to exchange knowledge and increase proficiency in cold weather tactics, survival skills, shelter building, ice fishing, and more. (U.S. Marine Corps photo by Sgt. Sara Graham/released)

Marines from 1st Battalion, 25th Marine Regiment, 4th Marine Division, present the colors along with the Boston Fire Department and color guards from different military service branches during a Veterans Day wreath laying ceremony at the Massachusetts Fallen Heroes Memorial in Boston, Nov. 11, 2016. The ceremony was part of a series of events celebrating the Marine Corps Reserve Centennial. Reserve Marines have served alongside their active duty counterparts in every clime and place for 100 years, leaving an indelible mark on the battle history of the Marine Corps. (U.S. Marine Corps photo by Cpl. Melissa Martens/ Released) - Marines from 1st Battalion, 25th Marine Regiment, 4th Marine Division, present the colors along with the Boston Fire Department and color guards from different military service branches during a Veterans Day wreath laying ceremony at the Massachusetts Fallen Heroes Memorial in Boston, Nov. 11, 2016. The ceremony was part of a series of events celebrating the Marine Corps Reserve Centennial. Reserve Marines have served alongside their active duty counterparts in every clime and place for 100 years, leaving an indelible mark on the battle history of the Marine Corps. (U.S. Marine Corps photo by Cpl. Melissa Martens/ Released)

Marines and Sailors from 1st Battalion, 25th Marine Regiment, 4th Marine Division, gather at the Massachusetts Fallen Heroes Memorial during the unit’s 10-year reunion, here, Oct. 8, 2016. The service members gathered to reflect and recognize the accomplishments of their deployment to Fallujah, Iraq, as well as memorialize the lives of their fallen brothers. (U.S. Marine Corps photo by Cpl. Melissa Martens/ Released) - Marines and Sailors from 1st Battalion, 25th Marine Regiment, 4th Marine Division, gather at the Massachusetts Fallen Heroes Memorial during the unit’s 10-year reunion, here, Oct. 8, 2016. The service members gathered to reflect and recognize the accomplishments of their deployment to Fallujah, Iraq, as well as memorialize the lives of their fallen brothers. (U.S. Marine Corps photo by Cpl. Melissa Martens/ Released)

The Scout Sniper Platoon with Company B, 1st Battalion, 25th Marine Regiment, 4th Marine Division, Marine Forces Reserve, provide fire support to their company during training exercise Nordic Frost, Jan. 8, 2016, at Ethan Allen Training Center in Jericho, Vt. The snipers provided support in the defensive position by attacking individual targets as they appeared at distances as far away as 1,000 meters. - The Scout Sniper Platoon with Company B, 1st Battalion, 25th Marine Regiment, 4th Marine Division, Marine Forces Reserve, provide fire support to their company during training exercise Nordic Frost, Jan. 8, 2016, at Ethan Allen Training Center in Jericho, Vt. The snipers provided support in the defensive position by attacking individual targets as they appeared at distances as far away as 1,000 meters.

EVANGOLA STATE PARK, N.Y. – Lance Cpl. Edward Doyle, a rifleman with Charlie Co., 1st Battalion, 25th Marine Regiment, 4th Marine Division, Marine Forces Reserve, patrols through the woods during exercise Lake Effect at Evangola State Park, New York, Sept. 12, 2015. Each platoon in Charlie. Co. set up their own patrol bases and routes which occasionally lead to confrontation with the other platoons, adding an element of realism to the training. (U.S. Marine Corps Photo By Cpl. J. Gage Karwick/Released) - EVANGOLA STATE PARK, N.Y. – Lance Cpl. Edward Doyle, a rifleman with Charlie Co., 1st Battalion, 25th Marine Regiment, 4th Marine Division, Marine Forces Reserve, patrols through the woods during exercise Lake Effect at Evangola State Park, New York, Sept. 12, 2015. Each platoon in Charlie. Co. set up their own patrol bases and routes which occasionally lead to confrontation with the other platoons, adding an element of realism to the training. (U.S. Marine Corps Photo By Cpl. J. Gage Karwick/Released)

Marines with Company B, 1st Battalion, 25th Marine Regiment load onto vehicles and prepare to travel to their training area for exercise Javelin Thrust 2010.::r::::n::::r::::n::Company B is based out of Manchester, N.H.::r::::n::::r::::n::The Company B Marines are among more than 4,500 Marines who will be participating in the exercise. - Marines with Company B, 1st Battalion, 25th Marine Regiment load onto vehicles and prepare to travel to their training area for exercise Javelin Thrust 2010.::r::::n::::r::::n::Company B is based out of Manchester, N.H.::r::::n::::r::::n::The Company B Marines are among more than 4,500 Marines who will be participating in the exercise.