III Marine Expeditionary Force
formation of the Marine Air-Ground Task Force of the United States Marine Corps
III Marine Expeditionary Force (III MEF) is a formation of the Marine Air-Ground Task Force of the United States Marine Corps. It is forward-deployed and able to rapidly conduct operations across the spectrum from humanitarian assistance and disaster relief (HA/DR) to amphibious assault and high-intensity combat.
It maintains a forward presence in Japan and Asia to support the Treaty of Mutual Cooperation and Security between the United States and Japan (1960) and other alliance relationships of the United States. III MEF also conducts combined operations and training throughout the region in support of the National Security Strategy for Theater Security Cooperation.
The Marines and sailors of III MEF engage in more than 65 combined, bilateral and multilateral training exercises annually throughout the Asia-Pacific region, in countries including treaty allies Japan, Thailand, South Korea, the Philippines, and Australia. These exercises build partner capacity, develop and maintain strong regional alliances and military-to-military contacts. These exercises prepare III MEF to conduct operations ranging from major combat operations to humanitarian assistance and disaster relief.
III MEF has played a significant role in humanitarian assistance and disaster relief missions throughout the region. The MEF assisted the relief efforts led by the Government of Japan during Operation Tomodachi after the 2011 Tōhoku earthquake and tsunami. III MEF also conducted HA/DR missions in Thailand in October 2011, the Philippines in October 2010, and Indonesia in October 2009.
The public source identifies “III Marine Expeditionary Force” as formation of the Marine Air-Ground Task Force of the United States Marine Corps. This brief keeps that definition visible, then builds a research path around Marine, Expeditionary and Force.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 5, 2026. The linked authority identifier is Q491478. VIAF identifies the subject as 8286149619466504010008. The Library of Congress control number is no2017065748. 2 of 4 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1960, 2011, 2010 and 2009.
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This entry incorporates text from “III Marine Expeditionary Force” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.