An official website of the United States government
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.


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

Balikatan 2026 | NMESIS

A U.S. Marine operates a NMESIS on to a U.S. Army LCU during Exercise Balikatan 2026 at Calayan, Cagayan, Philippines, May 2, 2026.

02

Balikatan 2026 | NMESIS

U.S. Marines load a NMESIS onto a C-130J during Exercise Balikatan 2026 at Cagayan North International Airport, Lal-lo, Philippines, April 25, 2026.

03

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.

04

KMEP 26.1 | Platoon Attacks

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

05

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

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

3rd Marine Division Year In Review 2025
3d Marine Division
Dec. 17, 2025 | 1:32
3rd Marine Division Year In Review 2025
3d Marine Division
Dec. 17, 2025 | 1:32
Player Embed Code:
Download
Tags
More
3rd Marine Division Year In Review 2025
1st MAW, 3d MARDIV participate in Fuji Viper 25.3
1st MAW, 3d MARDIV participate in Fuji Viper 25.3
Hagåtña Fury 21
Integrate and Operate: 12th Marine Regiment execute a HIMAR infiltration in Support of Keen Sword
HIMARS COMMEX
HIMARS HI-RAIN
Wintry Logistics | U.S. Marines, Sailors attached to the LCE participate in exercise Northern Viper
Wintry Logistics | U.S. Marines, Navy Sailors attached to the LCE provide logistical capabilities during exercise Northern Viper
ARTP - Hokkaido, Japan
U.S-Philippine AAV SMEE
3rd Reconnaissance Marines use Polaris MRZR at ARTP 19.2
Lt. Gen. Clardy addresses Japanese media as new III MEF Commanding General
What It Takes To Be Recon
Recon Screener
 
III Marine Expeditionary Force