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III Marine Expeditionary Force (MEF) Support Battalion provides and coordinates direct combat service support (CSS), security, and administrative services to III Marine Expeditionary Force (MEF), 3d Marine Expeditionary Brigade (MEB), and III MEF Information Group (MIG) Command Elements (CE) in order to enable III MEF to win in competition and conflict.

Featured News

Ready at Midnight: 500 Marines and Sailors Deploy Aboard USS San Diego (LPD-22) for the 31st MEU’s First Patrol of 2025

PHILIPPINE SEA, (March 11, 2025) – As midnight approaches through the warship’s red-lit passageways and inside every busy berthing, the familiar anthem “We Ready” by Archie Evermore blares over the ship’s public address system or 1 Main Circuit (1MC). Capt. Tim Carter, commanding officer of the amphibious transport dock ship, USS San Diego (LPD-22), arrests the speaker system right on cue for his address. Meanwhile, choppy seas gift some sailors and Marines with glazed eyes, upset stomachs, and pounding headaches. Thankfully, the sea sickness is only temporary. Carter zealously declares to those onboard that the ship, its crew, and its embarked Marine Corps landing force is indeed ready for whatever may come as they transit the Indo-Pacific.

III MEF Success Contributes to Marine Corps’ Consecutive Audit Achievements

MARINE CORPS BASE CAMP S. D. BUTLER, Okinawa, Japan – The III Marine Expeditionary Force played a crucial role in supporting the Marine Corps' financial audit, providing essential documents needed for various checks on financial activities related to purchases and payments. These activities form what is known as the Procure to Pay (P2P) process

U.S.-based F-35s replace Hornets in rotational deployments to Japan

The U.S. Marine Corps’ Japan-based aviation forces received their first F-35 deployment from the continental United States on March 8, 2025. Based out of Marine Corps Air Station Yuma, Arizona, Marine Fighter Attack Squadron (VMFA) 214, an F-35B squadron of Marine Aircraft Group 13, 3rd Marine Aircraft Wing, deployed to MCAS Iwakuni, Japan, under the Marine Corps’ Unit Deployment Program to temporarily support MAG-12, 1st MAW flight operations in the Indo-Pacific.

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Frag Out!

A U.S. Marine with III Marine Expeditionary Force throws an M67 fragmentation grenade during a training range on Camp Hansen, Okinawa, Japan, May 16,...