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

MRF-D 25.3: U.S. Marines, Armed Forces of the Philippines participate in MAREX 25

U.S. Marines with Marine Rotational Force – Darwin 25.3 and Armed Forces of the Philippines service members participate in Marine Exercise 2025 near...

02

Bringing the Heat: CLB-13 Refining Combat Readiness

U.S. Marines with Combat Logistics Battalion 13, Combat Logistics Regiment 17, 1st Marine Logistics Group, conduct a live-fire, crew-served weapons...

03

MRF-D 25.3: U.S. Navy nurses and corpsmen conduct enroute care training

U.S. Navy nurses alongside Navy corpsmen with Marine Rotational Force – Darwin 25.3, conduct enroute care drills at Royal Australian Air Force Base...

04

U.S. Marines with Marine Rotational Force – Darwin 25.3 maneuver into Balikatan 25

U.S. Marines with Marine Rotational Force – Darwin 25.3 maneuver into Balikatan 25 on April 22, 2025. Balikatan is a longstanding annual exercise...

05

15th MEU Conducts Gas Chamber Training (horizontal)

U.S. Marines assigned to the 15th Marine Expeditionary Unit, I Marine Expeditionary Force, conduct chemical, biological, radiological, nuclear (CBRN)...

06

Valiant Mark 25: Final Video

U.S. Marines with 1st Battalion, 5th Marine Regiment, 1st Marine Division, attached to Marine Rotational Force-Southeast Asia, alongside Singapore...

07

MRF-D 25.3: From the Field to the Future

U.S. Marines and Sailors with Marine Rotational Force – Darwin 25.3 and Australian Defence Force soldiers, sailors, participate in various sporting...

08

1st MARDIV Marines conduct EOTG Air Raid Course

U.S. Marines with 1st Battalion, 7th Marines, 1st Marine Division, conduct an air raid course hosted by the Amphibious Raids Branch, Expeditionary...

09

MRF-D 25.3 Marines prepare to deploy to Australia

U.S. Marines with I Marine Expeditionary Force conduct operations as part of previous iterations of Marine Rotational Force – Darwin in multiple...

10

1st ANGLICO Basic Course

U.S. Marines assigned to 1st Air Naval Gunfire Liaison Company, I Marine Expeditionary Force Information Group, participate in ANGLICO Basic Course...

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