A Marine with the 31st Marine Expeditionary Unit’s Force Reconnaissance Platoon rappels from a Navy MH-60S Seahawk helicopter toward the flight deck during low-light fast rope training aboard the USS Bonhomme Richard (LHD 6), underway in the Pacific Ocean, June 25, 2017. - A Marine with the 31st Marine Expeditionary Unit’s Force Reconnaissance Platoon rappels from a Navy MH-60S Seahawk helicopter toward the flight deck during low-light fast rope training aboard the USS Bonhomme Richard (LHD 6), underway in the Pacific Ocean, June 25, 2017. The FRP Marines train regularly for quick, tactical raids of targets on both land and sea. Fast roping allows Marines to enter inaccessible locations via rope from a hovering aircraft. The 31st MEU partners with the Navy’s Amphibious Squadron 11 to form the amphibious component of the Bonhomme Richard Expeditionary Strike Group. The 31st MEU and PHIBRON 11 combine to provide a cohesive blue-green team capable of accomplishing a variety of missions across the Indo-Asia-Pacific region. (Official U.S. Marine Corps photo by Staff Sgt. T. T. Parish/Released)

Marines with III Marine Expeditionary Force climb the steep slope of the landing beaches during a trip to Iwo Jima, Japan, Dec. 19, 2017. Marines from across III MEF, the 31st MEU and Marine Corps Installations Pacific, flew some 850 miles east, from Okinawa, Japan, to visit the historic island, now called Iwo To, to tour the battle site and honor the men who fought there in February 1945. (U.S. Marine Corps photo by Staff Sgt. T. T. Parish/Released) - Marines with III Marine Expeditionary Force climb the steep slope of the landing beaches during a trip to Iwo Jima, Japan, Dec. 19, 2017. Marines from across III MEF, the 31st MEU and Marine Corps Installations Pacific, flew some 850 miles east, from Okinawa, Japan, to visit the historic island, now called Iwo To, to tour the battle site and honor the men who fought there in February 1945. (U.S. Marine Corps photo by Staff Sgt. T. T. Parish/Released)

Vivianlee Aguero is a lance corporal in the United States Marine Corps. At 17 she enlisted as an embarkation specialist from her home in Guam. - Vivianlee Aguero is a lance corporal in the United States Marine Corps. At 17 she enlisted as an embarkation specialist from her home in Guam. She is currently attached to Marine Medium Tiltrotor Squadron 265 (Reinforced), 31st Marine Expeditionary Unit. As the Marine Corps’ only continuously forward-deployed MEU, the 31st MEU provides a flexible force ready to perform a wide range of military operations, from limited combat to humanitarian assistance, throughout the Indo-Asia-Pacific region. (U.S. Marine Corps photo by Cpl. Jonah Baase/Released)

Staff Sgt. Cody Fazio, an explosive ordnance disposal technician with Combat Logistics Battalion 31, inspects a disassembled improvised explosive device during counter-IED training at Camp Hansen, Okinawa, Japan, Nov. 22, 2017. - Staff Sgt. Cody Fazio, an explosive ordnance disposal technician with Combat Logistics Battalion 31, inspects a disassembled improvised explosive device during counter-IED training at Camp Hansen, Okinawa, Japan, Nov. 22, 2017. CLB-31, the Logistics Combat Element of the 31st Marine Expeditionary Unit, ensures all elements of the MEU are logistically ready to respond to any crisis. Marines used protective equipment and specialized tools to safely disable IEDs during the training. The 31st MEU provides a flexible force ready to perform a wide range of military operations, from limited combat to humanitarian assistance, throughout the Indo-Asia-Pacific region as the Marine Corps’ only continuously forward-deployed MEU. (U.S. Marine Corps photo by Cpl. Jonah Baase/Released)