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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.
U.S. Marine Corps Lance Cpl. Louis Demps, relays orders while executing platoon attack drills at Marine Corps Training Area Bellows, Hawaii.
A U.S. Marine maneuvers through a muddy creak during Operation Odyssey Stormbreaker III at Jungle Warfare Training Center, Okinawa, Japan.
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.
CAMP HANSEN, Okinawa, Japan – Marines with 7th Communication Battalion, III Marine Expeditionary Force Information Group, completed a weeklong field communications exercise at the Jungle Warfare Training Center, strengthening their ability to install, operate and maintain tactical networks in austere terrain while sharpening basic infantry tactics and skills.
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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.