Lt. Col. Siebrand Niewenhous IV, commanding officer, Sgt. Maj. Christopher Gasser and Sgt. Maj. Max Garcia salute during a relief and appointment ceremony at Camp Hansen, Okinawa, Japan, Feb. 24, 2017. Gasser relieved Garcia during the ceremony, assuming duties as senior enlisted advisor at Combat Logistics Battalion 31. (U.S. Marine Corps photo by Lance Cpl. Amy Phan/Released) - Lt. Col. Siebrand Niewenhous IV, commanding officer, Sgt. Maj. Christopher Gasser and Sgt. Maj. Max Garcia salute during a relief and appointment ceremony at Camp Hansen, Okinawa, Japan, Feb. 24, 2017. Gasser relieved Garcia during the ceremony, assuming duties as senior enlisted advisor at Combat Logistics Battalion 31. (U.S. Marine Corps photo by Lance Cpl. Amy Phan/Released)

An MV-22B Osprey with Marine Medium Tiltrotor 262 (Reinforced), 31st Marine Expeditionary Unit flies during flight operations aboard the USS Bonhomme Richard (LHD 6), Pacific Ocean, March 10, 2017. Marines and Sailors of the 31st MEU embarked aboard the USS Bonhomme Richard (LHD 6), part of the Bonhomme Richard Amphibious Readiness Group, as part of their annual spring patrol of the Indo-Asia-Pacific region. The 31st MEU, embarked on the amphibious ships of the Expeditionary Strike Group 7, has the capability to respond to any crisis or contingency at a moment’s notice. (U.S. Marine Corps photo by Lance Cpl. Amy Phan) - An MV-22B Osprey with Marine Medium Tiltrotor 262 (Reinforced), 31st Marine Expeditionary Unit flies during flight operations aboard the USS Bonhomme Richard (LHD 6), Pacific Ocean, March 10, 2017. Marines and Sailors of the 31st MEU embarked aboard the USS Bonhomme Richard (LHD 6), part of the Bonhomme Richard Amphibious Readiness Group, as part of their annual spring patrol of the Indo-Asia-Pacific region. The 31st MEU, embarked on the amphibious ships of the Expeditionary Strike Group 7, has the capability to respond to any crisis or contingency at a moment’s notice. (U.S. Marine Corps photo by Lance Cpl. Amy Phan)

Cpl. Kevin Foltz, a rifleman with Fox Co., Battalion Landing Team, 2nd Battalion, 5th Marines, 31st Marine Expeditionary Unit, finishes the Jungle Warfare Training Center’s endurance course at Camp Gonsalves, Okinawa, Japan, Jan. 24, 2017. JWTC exposes Marines to training situations and environments unique to the Indo-Asia-Pacific region which sustain operational readiness and enhance forward deployed capabilities. As the Marine Corps’ only continuously forward deployed unit, the 31st Marine Expeditionary Unit’s air-ground-logistics team provides a flexible force, ready to perform a wide range of military operations, from limited combat to humanitarian assistance operations, throughout the Indo-Asia- Pacific region. (U.S. Marine Corp's photo by Lance Cpl. Breanna L. Weisenberger/Released) - Cpl. Kevin Foltz, a rifleman with Fox Co., Battalion Landing Team, 2nd Battalion, 5th Marines, 31st Marine Expeditionary Unit, finishes the Jungle Warfare Training Center’s endurance course at Camp Gonsalves, Okinawa, Japan, Jan. 24, 2017. JWTC exposes Marines to training situations and environments unique to the Indo-Asia-Pacific region which sustain operational readiness and enhance forward deployed capabilities. As the Marine Corps’ only continuously forward deployed unit, the 31st Marine Expeditionary Unit’s air-ground-logistics team provides a flexible force, ready to perform a wide range of military operations, from limited combat to humanitarian assistance operations, throughout the Indo-Asia- Pacific region. (U.S. Marine Corp's photo by Lance Cpl. Breanna L. Weisenberger/Released)

A Marines with the Maritime Raid Force, 31st Marine Expeditionary Unit, provides security, during a realistic urban training exercise, at the Governor Ricardo J. Bordallo Complex, Asan, Guam, Feb. 2, 2017. As the Marine Corps' only continuously forward-deployed unit, the 31st Marine Expeditionary Unit's air-ground-logistics team provides a flexible force, ready to perform a wide range of military operations, from limited combat to humanitarian assistance operations, throughout the Indo-Asia-Pacific region. (U.S. Marine Corps video by Lance Cpl. Jorge A. Rosales/ Released) - A Marines with the Maritime Raid Force, 31st Marine Expeditionary Unit, provides security, during a realistic urban training exercise, at the Governor Ricardo J. Bordallo Complex, Asan, Guam, Feb. 2, 2017. As the Marine Corps' only continuously forward-deployed unit, the 31st Marine Expeditionary Unit's air-ground-logistics team provides a flexible force, ready to perform a wide range of military operations, from limited combat to humanitarian assistance operations, throughout the Indo-Asia-Pacific region. (U.S. Marine Corps video by Lance Cpl. Jorge A. Rosales/ Released)

Marines with the 31st Marine Expeditionary Unit embark aboard the USS Green Bay (LPD 20), White Beach Naval Facility, Okinawa, Japan, Feb. 1, 2017. Detachments from the air, ground and logistics combat elements of the 31st Marine Expeditionary Unit embarked Feb. 1, 2017 as a part of the MEU’s 17.1 Spring Patrol. The air-ground task force concept is designed to thoroughly exploit the combat power inherent in air and ground assets by closely integrating them into a single force under one commander. The MEU brings what it needs to sustain itself from the sea for the rapid accomplishment of the mission or to pave the way for follow-on forces. The size and composition of the MEU makes it well suited for amphibious operations, security operations, noncombatant evacuation operations, humanitarian assistance operations and special operations. (U.S. Marine Corps photo by Sgt. Tiffany Edwards/Released) - Marines with the 31st Marine Expeditionary Unit embark aboard the USS Green Bay (LPD 20), White Beach Naval Facility, Okinawa, Japan, Feb. 1, 2017. Detachments from the air, ground and logistics combat elements of the 31st Marine Expeditionary Unit embarked Feb. 1, 2017 as a part of the MEU’s 17.1 Spring Patrol. The air-ground task force concept is designed to thoroughly exploit the combat power inherent in air and ground assets by closely integrating them into a single force under one commander. The MEU brings what it needs to sustain itself from the sea for the rapid accomplishment of the mission or to pave the way for follow-on forces. The size and composition of the MEU makes it well suited for amphibious operations, security operations, noncombatant evacuation operations, humanitarian assistance operations and special operations. (U.S. Marine Corps photo by Sgt. Tiffany Edwards/Released)