I Marine Expeditionary Force

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

[I Marine Expeditionary Force @1stMEF]

#Marines with #11thMEU, conduct flight operations in the South China Sea, June 2, 2026.
The 11th MEU, embarked aboard the Boxer Amphibious Ready Group, is a persistent, combat credible force contributing to deterrence and crisis response in the U.S. 7th Fleet area of operations.

[I Marine Expeditionary Force @1stMEF]

#11thMEU Marines participate in shotgun familiarization training, June 2, 2026.

The 11th MEU, embarked aboard the Boxer Amphibious Ready Group, is a persistent, combat credible force contributing to deterrence and crisis response in the U.S. 7th Fleet area of operations.

[I Marine Expeditionary Force @1stMEF]

@USMC assigned to @Official13thMEU conduct a military free-fall in support of a simulated raid during Realistic Urban Training.

RUT is a critical pre-deployment exercise ensuring the force is prepared to respond rapidly and effectively to crises in unfamiliar urban environments.

[I Marine Expeditionary Force @1stMEF]

Marines with @MRFDarwin prepare for exercise Southern Jackaroo, May 27, 2026.

MRF-D is a six-month forward deployment to Australia that strengthens combined interoperability with the Australian Defence Force and provides rapid crisis-response options for the joint force.

[I Marine Expeditionary Force @1stMEF]

Marines assigned to @MRFDarwin 26 practice route clearing during Wallaby Walk, May 6, 2026.

Wallaby Walk is a two-week training exercise to certify Australian expeditionary explosive ordinance disposal teams for operational requirements against current and emerging threats.

[I Marine Expeditionary Force @1stMEF]

Australian army and U.S. Marines with @MRFDarwin, conduct demolition drills during Wallaby Walk, May 10, 2026.

Wallaby Walk is a two-week training exercise to certify explosive ordnance disposal teams for operational requirements against current and emerging threats.

[I Marine Expeditionary Force @1stMEF]

#USMarines with I Marine Expeditionary Force, conduct a Tactical Recovery of Aircraft and Personnel course at Marine Corps Base Camp Pendleton, California, May 18, 2026.

[U.S. Marines @USMC]

All Gave Some, Some Gave All

Today, we honor and remember those who gave the ultimate sacrifice wearing the uniform while defending our rights, freedoms and our great nation.

We will always remember and uphold their legacy.

✍️ (U.S. Marine Corps graphic by Lance Cpl. Matthew Morales)

#Marines #USMC #SemperFidelis

[Pacific Marines @PacificMarines]

#PacificMarines this week flew and fired!

@1stMEF - @11thmeu flight #operations the #USSBoxer in the Indian Ocean, May 15, 2026.

@IIIMEF - @3d_Marine_Div - #HIMAR #livefire training event at Camp Fuji, #Japan, May 20, 2026.

📷: Sgt. Trent Henry + LCpl. Skillah Sanchez | @USMC

[13th Marine Expeditionary Unit @Official13thMEU]

Congratulations to Capt. Victor Carrasco for being selected as #TheFighting13th Warrior of the Week.

Read more at: https://t.co/Hf5GhcKiv0

[13th Marine Expeditionary Unit @Official13thMEU]

Visit. Board. Search. Seize. 🚁🚢

#Marines with #TheFighting13th conduct Visit, Board, Search and Seizure training, rehearsing maritime interdiction tactics to secure and control vessels of interest.

@USMC @USNavy @1stMEF

[I Marine Expeditionary Force @1stMEF]

#USMarines with 3rd Light Armored Reconnaissance Battalion, @1st_Marine_Div conduct a first person view unmanned aircraft system integration.

https://t.co/U2mTZ84f6M

[I Marine Expeditionary Force @1stMEF]

#USMarines with Marine Medium Tiltrotor Squadron (VMM) 163 (Reinforced), @11thUnit, conduct flight operations aboard Wasp-class amphibious assault ship USS Boxer (LHD 4) in the Indian Ocean, May 15, 2026.

[I Marine Expeditionary Force @1stMEF]

Soldiers with the Singapore Armed Forces and #USMarines with 3rd Light Armored Reconnaissance Battalion, @1st_Marine_Div, conduct a subject matter expert exchange as part of Valiant Mark 26, Twentynine Palms, California, April 28, 2026

[I Marine Expeditionary Force @1stMEF]

#USMarines with 2nd Battalion, 5th Marine Regiment, @1stMarDivision, conduct a vertical assault course at Marine Corps Base Camp Pendleton, California, May 14, 2026

[I Marine Expeditionary Force @1stMEF]

#Marines with @3rdmaw and @1st_Marine_Div execute Exercise Garnet Rattler, May 7, 2026.

Garnet Rattler is a joint exercise between Marines and Airmen to train joint terminal attack controllers to increase efficiency, lethality and interoperability

[I Marine Expeditionary Force @1stMEF]

#Marines with 11th MEU, searches for vessels aboard San Antonio-class amphibious transport dock ship USS Portland (LPD 27) May 4, 2026.
The 11th MEU is a persistent, combat credible force contributing to deterrence and crisis response in the U.S. 7th Fleet area of operations.

[I Marine Expeditionary Force @1stMEF]

Certified! MRF-D 26 is Darwin’s first-ever Special Purpose Marine Air-Ground Task Force.

“Being the first rotation of MRF-D to be certified as an SPMAGTF is an incredible statement on the capability of the force,”

https://t.co/L7OqVbt6QN

[I Marine Expeditionary Force @1stMEF]

#Marines with @1st_Marine_Div, engage targets during Exercise Garnet Rattler, May 4, 2026. 

Garnet Rattler is a joint exercise between Marines and Airmen to train joint terminal attack controllers to increase efficiency, lethality and interoperability.

[I Marine Expeditionary Force @1stMEF]

#Marines with @MRFDarwin conduct a live fire range and recieve jungle warfare training during, Exercise Balikatan, May 1-5.

Balikatan is a longstanding annual exercise between the Armed Forces of the Philippines and U.S. military that represents the strength of our alliance.