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III MEF is the nucleus of a joint and coalition Stand-In Force within the First Island Chain. In competition, III MEF assures and expands access for the joint force across the Indo-Pacific. In crisis, it provides in-place response forces to secure allies and partners while deterring adversary aggression. In conflict, III MEF fights from advanced naval bases as part of a naval expeditionary force and enables Joint Force objectives in the Indo-Pacific.
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U.S. Marines with the 31st MEU conduct live-fire training at Combined Arms Training Center, Camp Fuji, Japan, Sept. 26-Oct. 15, 2025.
U.S. Marine Corps Lance Cpl. Dario Astuhuaman fires an M27 Infantry Automatic Rifle during a live fire range at Camp Schwab, Okinawa, Japan.
U.S. Marines from across the III Marine Expeditionary Force trained alongside Japan Self-Defense Force personnel during exercise Resolute Dragon 25.
U.S. Marine Corps Cpl. Tyler Pacheco, a rifleman with 12th Littoral Combat Team, maneuvers through wooded terrain during Resolute Dragon 25.
U.S. Marine Corps Lt. Gen. Roger Turner and Lt. Gen. Seiji Toriumi shake hands to commemorate the opening ceremony of Resolute Dragon 25.
U.S. Marines with Hotel Battery, 31st MEU, ready an M142 HIMARS during a loading exercise at Kadena Air Base, Okinawa, Japan, Aug 27, 2025.
CAMP HANSEN, Okinawa, Japan — U.S. Marines with Expeditionary Operations Training Group, III Marine Expeditionary Force integrated advanced drone technology into III MEF operations Nov. 6 at Camp Hansen, marking a significant step forward in unmanned systems employment in the Indo-Pacific region.
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