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III MARINE EXPEDITIONARY FORCE

III MEF Logo
FORWARD. FAITHFUL. FOCUSED.
Okinawa, Japan

Who we are

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.

 

 

01

3D MARDIV | Drone Operators

A Marine flys a Neros Archer first-person view drone on Camp Schwab, Okinawa, Japan, May 22, 2026.

02

ARTP | Camp Fuji

Marines pose for a group photo during Artillery Relocation Training Program 26.1 at the Combined Arms Training Center, Camp Fuji, Japan, May 25, 2026.

03

Kaiju Rain 26 | Surveillance

Lance Cpl. Jorryn Tutu, an intelligence surveillance and reconnaissance systems engineer sets a satellite Camp Hansen, Okinawa, Japan, May 20, 2026.

04

CATC Fuji | HIMARS

Marines load a rocket pod onto a HIMARS to conduct live fire missions during a live fire training event. Camp Fuji, Japan, May 20, 2026.

05

Marines maintain CH-53E

A U.S. Marine inspects a CH-53E Super Stallion helicopter during routine maintenance at Marine Corps Air Station Futenma, Okinawa, Japan

06

Opportunity in the Indo-Pacific

U.S. Marines with III MEF share their perspectives on the professional, personal, and family benefits of serving in the Indo-Pacific.

 

Featured News

U.S. and ROK Marines conduct dry close air support exercise  (REEL)
III MEF Information Group
July 30, 2025 | 0:56
U.S. and ROK Marines conduct dry close air support exercise  (REEL)
III MEF Information Group
July 30, 2025 | 0:56
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U.S. and ROK Marines conduct dry close air support exercise  (REEL)
Outlaw Wrath 24
Navy Medical Personnel Train In The Fundamentals Of Critical Care Support Course.
Exercise Katana Strike, Keen Sword Coming Soon
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III MEF Support Battalion - Change of command
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It’s A Bird,  It’s A Plane, It’s A HIMARS? | Marines with 3rd TSB conduct HST operations
Forward Fueling | U.S. Marines with 9th ESB conduct Forward Arming and Refueling Point
Raft It Up! | 9th ESB Marines conduct expeditionary bridging exercise
Motor T Rodeo | 3rd Marine Logistics Group participate in back in the saddle training
Motor T Rodeo | 3rd Marine Logistics Group participate in back in the saddle training
VMU-3 aerial insert exercise
Disruptive Minds | GSM Company demonstrates 3D printing capabilities
 
III Marine Expeditionary Force