Marines with Weapons Company, 1st Battalion, 24th Marines, 25th Marine Regiment, 4th Marine Division, navigate the route to their next checkpoint during the final exercise of exercise Nordic Frost on Camp Ethan Allen Training Site in Jericho, Vt., Jan. 22, 2018. The exercise allowed Marines to demonstrate their ability to operate in a cold weather mountainous environment, conducting land navigation, marksmanship training, demolitions, call for fire training and other core competencies. (U.S. Marine Corps photo by Pfc. Samantha Schwoch/released) - Marines with Weapons Company, 1st Battalion, 24th Marines, 25th Marine Regiment, 4th Marine Division, navigate the route to their next checkpoint during the final exercise of exercise Nordic Frost on Camp Ethan Allen Training Site in Jericho, Vt., Jan. 22, 2018. The exercise allowed Marines to demonstrate their ability to operate in a cold weather mountainous environment, conducting land navigation, marksmanship training, demolitions, call for fire training and other core competencies. (U.S. Marine Corps photo by Pfc. Samantha Schwoch/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). - 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).

Camp Atterbury, Ind. - A foot-mobile M98A2 Javelin team fires at a target down range during their Reserve forces drill period training, March 15, 2014, at a firing range on Camp Atterbury Joint Maneuver Center. Firing a javelin missile is a rare opportunity for the Marines, considered by many to be a once in a lifetime practice shoot. The Marines are with Weapons Company, 2nd Battalion, 24th Marine Regiment, 4th Marine Division.(Marine Corps photo by Cpl. J. Gage Karwick/released) - Camp Atterbury, Ind. - A foot-mobile M98A2 Javelin team fires at a target down range during their Reserve forces drill period training, March 15, 2014, at a firing range on Camp Atterbury Joint Maneuver Center. Firing a javelin missile is a rare opportunity for the Marines, considered by many to be a once in a lifetime practice shoot. The Marines are with Weapons Company, 2nd Battalion, 24th Marine Regiment, 4th Marine Division.(Marine Corps photo by Cpl. J. Gage Karwick/released)