31st MAU

The 31st Marine Amphibious Unit (31st MAU), originally activated in March 1967, is a forward-deployed, rapid-response Marine Air-Ground Task Force of the United States Marine Corps. The unit played a pivotal role during the Vietnam War, conducting amphibious operations and contingency missions throughout the Western Pacific. In 1988, the 31st MAU was redesignated as the 31st Marine Expeditionary Unit (MEU), reflecting its enhanced capabilities and evolving mission set. Today, the 31st MEU remains the only continuously forward-deployed MEU, supporting U.S. interests and humanitarian assistance operations in the Indo-Pacific region.