Colonel Robert Brodie, newly appointed commander of the 31st Marine Expeditionary Unit, accepts the unit guidon from Col. Tye R. Wallace during a change of command ceremony at Camp Hansen, Okinawa, Japan, June 13, 2018. - Colonel Robert Brodie, newly appointed commander of the 31st Marine Expeditionary Unit, accepts the unit guidon from Col. Tye R. Wallace during a change of command ceremony at Camp Hansen, Okinawa, Japan, June 13, 2018. Brodie assumed command after recently serving at 1st Air Force, 601st Air Operations Center. Wallace, a graduate of Rensselaer Polytechnic Institute in Troy, New York, led the 31st MEU through four deployments during his tenure, including the historic operational MEU deployment featuring the F-35B Lightning II fighter jet earlier in 2018. The 31st MEU, the Marine Corps' only continuously forward-deployed MEU, provides a flexible force ready to perform a wide-range of military operations. (U.S. Marine Corps Photo by Gunnery Sgt. T. T. Parish/Released)

Noncommissioned officers with the 31st Marine Expeditionary Unit sprint as a warm-up for a Force Fitness Instructor led High Intensity Tactical Training session at Camp Hansen, Okinawa, Japan, June 8, 2018. - Noncommissioned officers with the 31st Marine Expeditionary Unit sprint as a warm-up for a Force Fitness Instructor led High Intensity Tactical Training session at Camp Hansen, Okinawa, Japan, June 8, 2018. The 31st MEU is adopting an NCO-led FFI program to improve overall physical fitness while reducing injury and building unit morale. The 31st MEU, the Marine Corps' only continuously forward-deployed MEU, provides a flexible force ready to perform a wide-range of military operations. (U.S. Marine Corps Photo by Gunnery Sgt. T. T. Parish/Released)

An MV-22B Osprey belonging to Marine Medium Tiltrotor Squadron 262 (Reinforced) prepares to land on Farallon de Medinilla Range, Commonwealth Northern Mariana Islands, Sept. 16, 2016. - An MV-22B Osprey belonging to Marine Medium Tiltrotor Squadron 262 (Reinforced) prepares to land on Farallon de Medinilla Range, Commonwealth Northern Mariana Islands, Sept. 16, 2016. Valiant Shield is a biennial U.S. Air Force, Navy and Marine Corps exercise held in Guam, focusing on real-world proficiency in sustaining joint forces at sea, in the air, on land and in cyberspace. (U.S. Marine Corps photo by Staff Sgt. T.T. Parish)