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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

31st MEU | VMFA 242

U.S. Marine Corps F-35B Lightning II aircraft assigned to Marine Fighter Attack Squadron 242, fly over the USS America with 31st MEU.

02

31st MEU | Anti-Submarine

A U.S. Marine Corps MV-22B Osprey assigned to Marine Medium Tiltrotor Squadron 265, departs the USS George Washington with the 31st MEU.

03

HMLA-169 | Live Fire Maneuvers

U.S. Marine Corps Sgt. Ethan Cox, a crew chief with Marine Light Attack Helicopter 169 fires a GAU-21 machine gun during a live fire exercise.

04

HMLA-169 | Light Attack Power

UH-1Y Venom and AH-1Z Viper helicopters with Marine Light Attack Helicopter Squadron 169, fly off the coast of Okinawa, Japan, July 19, 2025.

05

3d DIV | Search and Recovery

3d Reconnaissance Battalion Marines dive during a search and recovery drill on Camp Schwab, Okinawa, Japan, July 15, 2025.

06

31st MEU | MRF Night Raid

U.S. Marines with Maritime Raid Force, 31st Marine Expeditionary Unit, load simulated casualties onto a U.S. Marine Corps MV-22B Osprey.

 

Featured News

VMGR-152 Marines train during exercise Red-Flag Alaska
1st Marine Aircraft Wing
Aug. 8, 2025 | 1:31
VMGR-152 Marines train during exercise Red-Flag Alaska
1st Marine Aircraft Wing
Aug. 8, 2025 | 1:31
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VMGR-152 Marines train during exercise Red-Flag Alaska
VMFA-214 and MWCS-18 collaborate with 3d MARDIV JTAC in CAS training
Osan DFT
U.S. Air Force F-16s conduct tactical training during Freedom Flag 25-1
Republic of Korea, U.S. forces fly during Freedom Flag 25-1
U.S. Marine F-35Bs fly during exercise Freedom Flag 25-1
U.S. Marines train in forward arming and refueling operations Freedom Flag 25-1 FARP Training
31 seconds with the 31st MEU: Expostrike
VMGR-152 Marines train in Guam
MWHS-1 Birthday Ball Video
HMLA-267 and HMH-465 Interviews
Marines with VMFA(AW)-533 Conduct Aviation Training Relocation
Expanding the Battlefield
31st MEU Patrol Recap
HMH-463 Marine receives Maintenance Marine of the Year
 
III Marine Expeditionary Force