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I Marine Expeditionary Force Profile
I Marine Expeditionary Force

@1stMEF

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The official X account of I MEF. Links, Likes, and RTs do not constitute endorsement.

Camp Pendleton, California
Joined May 2013
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@PacificMarines
Pacific Marines
7 days
- 🗺️ On the Ground: #PacificMarines with @1stMEF and the #PMC led simulated maritime strike operations from the Bilateral Coordination Center at Marine Base Camp Rodolfo, Philippines, Oct. 15, 2025. 📸: GySgt. Manuel A. Serrano | @USMC
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@VP
Vice President JD Vance
@VP
9 days
Vice President Vance to Marines at the 250th USMC anniversary celebration: “I realized I had a responsibility to something so much greater than myself. And I had an obligation to act on that feeling of duty.”
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@USNavy
U.S. Navy
11 days
From the sea comes the fight ⚓️ For 250 years, the Navy and @USMC have forged strength through training, tested resolve, and a shared will to win.
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@1stMEF
I Marine Expeditionary Force
11 days
From ship to shore - @USMC and @USNavy proved why America’s expeditionary force-in-readiness remains capable, credible, and lethal. #Marines250
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@USNavy
U.S. Navy
11 days
First to fight. Always together. ⚓️ From sea to shore, today’s demonstration showed the power, precision, and partnership of the Navy–Marine Corps Team.
@SECNAV
Secretary of the Navy John C. Phelan
11 days
Since Nov. 10, 1775, our Marines have been the ‘First to Fight’ From sea to shore, today’s Amphibious Capabilities Demonstration showcased @USMC power, precision and ability to win in any domain. When our nation dials 9-1-1, the Marines answer.
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@1stMEF
I Marine Expeditionary Force
11 days
I MEF is honored to showcase the heart of the Navy-Marine Corps team. Lethality isn’t a concept - it’s the @USMC
@SECNAV
Secretary of the Navy John C. Phelan
11 days
Since Nov. 10, 1775, our Marines have been the ‘First to Fight’ From sea to shore, today’s Amphibious Capabilities Demonstration showcased @USMC power, precision and ability to win in any domain. When our nation dials 9-1-1, the Marines answer.
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@1stMEF
I Marine Expeditionary Force
28 days
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@1stMEF
I Marine Expeditionary Force
1 month
Super Garuda Shield 25: MRF-D 25.3 Enables combined amphibious exercise Exercises like Super Garuda Shield 25 offer a glimpse of the new norm for the MRF-D MAGTF. #IMEF #MRFD https://t.co/9LFgrBT8Pe
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imef.marines.mil
During Exercise Super Garuda Shield 25, a detachment from 1st Air Naval Gunfire Liaison Company (ANGLICO), Marine Rotational Force — Darwin (MRF-D) 25.3, supported a multi-national amphibious exercise
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@1stMEF
I Marine Expeditionary Force
1 month
Driving momentum forward: I MEF and MCIWEST execute OCS III to enhance Marines' quality of life This iteration further concentrates time, tools, and trained teams on high-impact fixes in common areas and living spaces. #IMEF #MCIWest https://t.co/zsO9N5FkZS
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imef.marines.mil
I Marine Expeditionary Force and Marine Corps Installations West–Marine Corps Base Camp Pendleton launched Operation Clean Sweep III today, driving barracks improvements from across the Western region
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@1stMEF
I Marine Expeditionary Force
2 months
Thunderstruck: Marines compete in first ever service-wide communications team competition “The event attests to the whole-Marine concept — the ‘Marine communicator,’ not just the everyday communicator.” #USMC #Comms https://t.co/lfhauT9HHq
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imef.marines.mil
U.S. Marines from across the globe competed in the inaugural Thunderstruck Communications Team Competition, hosted by Marine Wing Communications Squadron 38, Marine Air Control Group 38, 3rd Marine
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@1stMEF
I Marine Expeditionary Force
2 months
I MEF Marines test drone systems in Defense Innovation Unit challenge “Events like these ensure our Marines will have the best available tools at their disposal in the next conflict.” #USMC #IMEF https://t.co/zXKkIRu8AZ
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imef.marines.mil
Marines with I Marine Expeditionary Force partnered with the Defense Innovation Unit and industry leaders during Phase 2 of the DIU’s G.I. Challenge, Aug. 18-29, 2025, to evaluate commercial small
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@1stMEF
I Marine Expeditionary Force
2 months
From the Philippines to Indonesia, MRF-D manuevers combat credible forces afloat "Exercise Alon, from planning to execution, showed the strength in partnership between three countries and their willingness to operate together.” #USMC #MRFD https://t.co/Vn0TIBUmJm
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imef.marines.mil
Within weeks of completing humanitarian assistance and disaster relief (HADR) operations in the Philippines, U.S. Marines and Sailors with the Marine Rotational Force – Darwin (MRF-D) 25.3 Marine
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@1stMEF
I Marine Expeditionary Force
2 months
Aircraft, HIMARS conduct joint land strike during Super Garuda Shield 25 “It is good developing our relationship with the United States and Australia, training reinforces readiness to keep the region safe.” #USMC #MRFD https://t.co/PpfRw8yvVU
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imef.marines.mil
The U.S. Army and Indonesian Armed Forces supported a multiday joint land strike with an Australian Joint Terminal Attack Controller (JTAC) underscoring continued partnership and interoperability at
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@USMC
U.S. Marines
2 months
#Marines and @USNavy #Sailors with 1st Marine Logistics Group participate in the Corpsmen Games on @MCIWPendletonCA. The games build unit cohesion, unit moral, and test the service members on their tactical combat casualty care abilities in stressful environments. #USMC
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@1stMEF
I Marine Expeditionary Force
2 months
Marine Fighter Attack Squadron 232 'Red Devils' celebrate 100th anniversary “Wearing the Red Devil patch means we carry the responsibility to continue this legacy.” #IMEF #3rdMAW https://t.co/WZkqynmjAs
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imef.marines.mil
The 3rd Marine Aircraft Wing celebrated the 100th anniversary of Marine Fighter Attack Squadron (VMFA) 232 “Red Devils,” an F/A-18 squadron with Marine Aircraft Group 11, during a commemorative
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@1stMEF
I Marine Expeditionary Force
2 months
I MEF Commanding General Relinquishes Command “To the Marines standing before us, you are the soul of this very MEF... it has been my most humble privilege to serve alongside all of you.” #IMEF #USMC https://t.co/m7Y9d7FraO
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imef.marines.mil
U.S. Marine Corps Lt. Gen. Michael S. Cederholm relinquished command of I Marine Expeditionary Force to Lt. Gen. Christian F. Wortman during a change of command ceremony held here today.
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@1stMEF
I Marine Expeditionary Force
2 months
MRF-D's Rapid Response: From training to Disaster Relief and back again “The United States stands shoulder to shoulder with our Filipino allies, especially in responding to disasters.” #IMEF #MRFD https://t.co/i3nmOBsluR
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imef.marines.mil
At the close of Exercise Talisman Sabre 25, the Indo-Pacific’s largest combined military exercise with over 40,000 service members, U.S. Marines with the Marine Rotational Force – Darwin (MRF-D) 25.3
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@1st_Marine_Div
1st Marine Division
3 months
Nature stroll ⛰ #marines with 1st Battalion, 5th Marine Regiment, 1st Marine Division, kick off Mountain Training with a conditioning hike at Marine Corps Mountain Warfare Training Center Bridgeport, California. 📸: @USMC photo by Cpl. Migel A. Reynosa
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@DVIDSHub
DVIDSHub
3 months
U.S. #Marines refuel an F-35B Lightning ll during a forward arming and refueling point as part of Service Level Training Exercise 4-25 at Marine Corps Air Ground Combat Center, Twentynine Palms, #California
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dvidshub.net
U.S. Marines with 3rd Marine Aircraft Wing, refuel a F-35B Lightning ll assigned to VMFA 225, during a forward arming and refueling point as part of Service Level Training Exercise 4-25 at Marine...
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