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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

COMMSTRAT FTX | 12K HIKE

A U.S. Marine with 3rd Marine Division conducts a hike during the COMMSTRAT Field Training Exercise at Camp Hansen, Okinawa, Japan, April 8, 2026.

02

KMEP 26.1 | Platoon Attacks

Republic of Korea Marine Corps tanks fire after rehearsing squad attacks during the Korean Marine Exchange Program 26.1

03

VMFA-242 | Flight Operations

U.S. Marines with 1st Marine Aircraft Wing, performs a pre-flight inspection on an F-35B at Marine Corps Air Station Iwakuni, Yamaguchi, Japan

04

U.S. Marines & JGSDF Landing

U.S. Marines and Japan Ground Self-Defense Force members conduct a beach landing during exercise Iron Fist 26 in Tanegashima, Japan, March 2, 2026.

05

Marines, Rangers & Berets

U.S. Marines, Rangers, and Berets deploy from a KC-130J Super Hercules aircraft during a simulated raid on Ie Shima, Okinawa, Japan, Feb. 19, 2026.

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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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