I Marine Expeditionary Force

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Ready. Engaged. Faithful.
Official U.S. Marine Corps Website

Who we are

I MEF provides the Marine Corps a globally responsive, expeditionary, and fully scalable Marine Air-Ground Task Force (MAGTF), capable of generating, deploying, and employing ready forces and formations for crisis response, forward presence, major combat operations, and campaigns.

 

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01

Clearing the Past, Protecting the Future: Operation Render Safe 25.1

U.S. Marines with Marine Rotational Force — Darwin 25.3, sailors and soldiers participate in Operation Render Safe 25.1 with service members from the...

02

MRF-D 25.3: 2nd Bn., 1st Marines completes Predator Series 2025

U.S. Marines with 2nd Battalion, 1st Marine Regiment, Marine Rotational Force – Darwin 25.3, complete participating in Predator Series 2025 at Mount...

03

Operation Ironclad: Discipline Defines Us

U.S. Marines and Sailors throughout I Marine Expeditionary Force and Marine Corps Installations – West initiate Operation Ironclad, June 2, 2025....

04

KAMANDAG 9: U.S., Philippine Marines conduct counter-landing live-fire

U.S. Marines with 2nd Battalion, 1st Marine Regiment, Marine Rotational Force – Darwin 25.3, I Marine Expeditionary Force Forward, and Philippine...

05

U.S. Marines, Sailors dive into the deep end for water survival

U.S. Marines and Sailors with 1st Marine Division train to become water survival advanced-qualified at Marine Corps Base Camp Pendleton, California,...

06

Balikatan 25: 40 years shoulder to shoulder

Armed Forces of the Philippines and U.S. armed forces participate in Exercise Balikatan 25 in the Philippines, April 21 to May 9, 2025. Balikatan is...

07

REEL: MRF-D 25.3: Highlighting the MAGTF

Marine Rotational Force – Darwin 25.3 showcases the MAGTF’s capabilities from March 20 to May 18, 2025, across the Indo-Pacific. MRF-D 25.3 is part...

08

Balikatan 25: MRF – D 25.3, PMC, ADF participate in Balikatan 25

U.S. Marines with 2nd Battalion, 1st Marine Regiment, Marine Rotational Force – Darwin 25.3, Australian Army soldiers with 5th/7th Battalion, The...

09

MRF-SEA 25 Deployment

U.S. Marines and Sailors with Marine Rotational Force-Southeast Asia, as a stand-in force, completing their Fiscal Year 2025 deployment and for the...

10

Meet Your MRF-D: Part One

U.S. Navy Petty Officer 2nd Class Gable Schmidt, a corpsman with Marine Rotational Force — Darwin 25.3, Philippine Marine Corps 2nd Lt. Owen Lubrica,...

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