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I Marine Expeditionary Force

@1stMEF

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

 Camp Pendleton, California
linktr.ee/imef
Joined May 2013
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#Marines with @1st_Marine_Div, participate in the Weapons and Tactics Instructor course 1-27, Oct. 20, 2026. WTI is a seven-week training event to emphasize operational integration in support of the MAGTF, Joint and Coalition Forces.
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#Marines and #Sailors with @MRFSEAsia and @MRFDarwin embrace family and friend an upon their return from deployment, Oct. 23-24, 2026 Families and friends are the bedrock of our units. Thank you to the loved ones who supported their Marines and Sailors from afar.
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3d Marine Aircraft Wing (@3d_maw) profile picture
3d Marine Aircraft Wing@3d_mawOct 31
3d MAW highlighted Marines and their answer to one important question “What’s Your Why?” By discovering and sharing their “why,” Marines were reminded of the importance of understanding what drives them, finding purpose and inspiring those around them. #WhatsYourWhy #3dMAW #USMC
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Marines can vote wherever they are. Marines across #IMEF are encouraged to exercise their right to vote. Visit FVAP.GOV to register and request your ballot. @USMC 🎨 by Staff Sgt. Lance Kell #IMEF #Marines #Vote
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I Marine Expeditionary Force retweeted
Pacific Marines (@PacificMarines) profile picture
Pacific Marines
@PacificMarinesOct 30
#PacificMarines with @1st_Marine_Div utilize #LAV25 light armored vehicles for a #closeairsupport exercise during Weapons and Tactics Instructor course 1-27 at Yuma, #Arizona, Oct. 19, 2026. 📸: Sgt. Calah Thompson | @USMC @1stMEF @USPACOM
U.S. Marines with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division stage in LAV-25 light armored vehicles before the start of a close air support exercise during Weapons and Tactics Instructor course 1-27 at Yuma, Arizona, Oct. 19, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps Photo by Sgt. Calah Thompson)

ALT U.S. Marines with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division stage in LAV-25 light armored vehicles before the start of a close air support exercise during Weapons and Tactics Instructor course 1-27 at Yuma, Arizona, Oct. 19, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps Photo by Sgt. Calah Thompson)

U.S. Marine Corps Lance Cpl. Christian Sage, a light armored vehicle operator with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, poses for a photo on top of an LAV-25 light armored vehicle during a close air support exercise as part of Weapons and Tactics Instructor course 1-27 at Yuma, Arizona, Oct. 19, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. Sage is a native of Louisiana. (U.S. Marine Corps photo by Sgt. Calah Thompson)

ALT U.S. Marine Corps Lance Cpl. Christian Sage, a light armored vehicle operator with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, poses for a photo on top of an LAV-25 light armored vehicle during a close air support exercise as part of Weapons and Tactics Instructor course 1-27 at Yuma, Arizona, Oct. 19, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. Sage is a native of Louisiana. (U.S. Marine Corps photo by Sgt. Calah Thompson)

U.S. Marine Corps Cpl. Nathan Dierenfeild, a light armored vehicle commander with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, zeroes a mounted M240B medium machine gun during a close air support exercise as part of Weapons and Tactics Instructor course 1-27 at Yuma, Arizona, Oct. 19, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. Derifield is a native of Montana. (U.S. Marine Corps Photo by Sgt. Calah Thompson)

ALT U.S. Marine Corps Cpl. Nathan Dierenfeild, a light armored vehicle commander with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, zeroes a mounted M240B medium machine gun during a close air support exercise as part of Weapons and Tactics Instructor course 1-27 at Yuma, Arizona, Oct. 19, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. Derifield is a native of Montana. (U.S. Marine Corps Photo by Sgt. Calah Thompson)

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I Marine Expeditionary Force retweeted
13th Marine Expeditionary Unit (@Official13thMEU) profile picture
13th Marine Expeditionary Unit@Official13thMEUOct 30
THE MAGTF SHIELD 🛡️🦅 #TheFighting13th Low Altitude Air Defense detachment provides critical air defense to safeguard the MAGTF from low-altitude threat as a close-in defensive umbrella. These teams ensure our integrated forces can maneuver freely. @USMC @PacificMarines @1stMEF
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Raising the Standard 🤝 📍Camp Pendleton, California A U.S. Marine with @1stMLG, operates a grader during Operation Clean Sweep V. The operation aimed to improve the barracks, and surrounding areas of CLR-1. USMC 📷 Lance Cpl. Katherine Fohn
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Secretary of War Pete Hegseth (@SecWar) profile picture
Secretary of War Pete Hegseth
@SecWarSep 25
TO OUR WARRIORS—MAKE SURE TO VOTE! Visit FVAP.GOV to register and request your ballot.
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𝗦𝘂𝗽𝗽𝗼𝗿𝘁𝗶𝗻𝗴 𝗢𝘂𝗿 𝗪𝗮𝗿𝗳𝗶𝗴𝗵𝘁𝗲𝗿𝘀 🤝 📍Camp Pendleton Mr. Dakota Meyer speaks to Marines about improving living conditions within barracks. Meyer visited I MEF to gain information supporting the improvement of military barracks. @USMC📸Cpl. Joshua Bustamante
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𝙄𝙣𝙩𝙚𝙜𝙧𝙖𝙩𝙚𝙙 𝙏𝙖𝙘𝙩𝙞𝙘𝙨 📍Yuma, Arizona #Marines with #3dLAR, @1st_Marine_Div, and #MAWTS-1 train during #WTI127. WTI integrates Marine aviation capabilities in support of MAGTF, joint and coalition forces. @USMC📸 Sgt. Calah Thompson
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#Marines with #3dAABn, @1st_Marine_Div, swim and run during battalion physical training, Oct. 8, 2026. Unit PT builds esprit de corps, reinforces standards, and strengthens morale and resilience.
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I Marine Expeditionary Force retweeted
13th Marine Expeditionary Unit (@Official13thMEU) profile picture
13th Marine Expeditionary Unit@Official13thMEUOct 25
PRINTING THE SOLUTION ⚙️⚓ The LCE with #TheFighting13th uses advanced 3D printing and fabrication equipment aboard @USSMakinIsland to manufacture vital parts while underway to minimizes our reliance on shore-based supply lines. @Marines @PacificMarines @1stMEF
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Courage is at the heart of our core values. Small unit leaders build trust, connection, and resilience, creating a culture where every Marine knows they never fight alone. #NoMarineFightsAlone #IMEF
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Pacific Marines (@PacificMarines) profile picture
Pacific Marines
@PacificMarinesOct 22
#PacificMarines assigned to @1st_Marine_Div utilize #LAV25 Light Armored Vehicles and VXE-30 #Stalker small-unmanned aircraft systems during Weapons and Tactics Instructor Course 1-27 at Yuma, #Arizona, Oct. 6, 2026. 📸: Sgt. Calah Thompson | @USMC @1stMEF @USPACOM
A U.S. Marine Corps VXE-30 Stalker small-unmanned aircraft system takes off as part of a close air support exercise during Weapons and Tactics Instructor course 1-27, at Yuma, Arizona, Oct. 6, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

ALT A U.S. Marine Corps VXE-30 Stalker small-unmanned aircraft system takes off as part of a close air support exercise during Weapons and Tactics Instructor course 1-27, at Yuma, Arizona, Oct. 6, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

U.S. Marines with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, conduct mounted reconnaissance in support of offensive air support training during Weapons and Tactics Instructor course 1-27, at Yuma, Arizona, Oct. 6, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

ALT U.S. Marines with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, conduct mounted reconnaissance in support of offensive air support training during Weapons and Tactics Instructor course 1-27, at Yuma, Arizona, Oct. 6, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

An LAV-25 Light Armored Vehicle assigned to Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, sits staged at an objective point in support of offensive air support training during Weapons and Tactics Instructor course 1-27, at Yuma, Arizona, Oct. 6, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

ALT An LAV-25 Light Armored Vehicle assigned to Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, sits staged at an objective point in support of offensive air support training during Weapons and Tactics Instructor course 1-27, at Yuma, Arizona, Oct. 6, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

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Eyes Over The Pacific A #Marines AH-1Z Viper assigned to @Official13thMEU flies over Oahu, Hawaii, Oct. 7, 2026. @USMC 📷 Lance Cpl. Fernando Cruz Martinez #USMC #13thMEU #Pacific
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#Marines with @1st_Marine_Div conduct a Raid Leaders course at @MCIWPendletonCA, Oct. 8, 2026. The course sharpens raid tactics, techniques, and procedures to prepare Marines to support geographic combat commands.
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I Marine Expeditionary Force retweeted
Pacific Marines (@PacificMarines) profile picture
Pacific Marines
@PacificMarinesOct 20
#PacificMarines with @1st_Marine_Div and Marine Aviation Weapons and Tactics Squadron One participate in the Weapons and Tactics Instructor course 1-27 at Dugway Proving Ground, #Utah, Oct. 7, 2026. 📸: Sgt. Calah Thompson | @USMC @USPACOM
A U.S. Marine with Marine Aviation Weapons and Tactics Squadron One, looks out the back of an MV-22B Osprey during a long-range raid as part of Weapons and Tactics Instructor course 1-27, near Dugway Proving Ground, Utah, Oct. 7, 2026. WTI is a seven-week training event hosted by MAWTS-1 which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

ALT A U.S. Marine with Marine Aviation Weapons and Tactics Squadron One, looks out the back of an MV-22B Osprey during a long-range raid as part of Weapons and Tactics Instructor course 1-27, near Dugway Proving Ground, Utah, Oct. 7, 2026. WTI is a seven-week training event hosted by MAWTS-1 which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

A U.S. Marine Corps MV-22B Osprey assigned to Marine Aviation Weapons and Tactics Squadron One, prepares to land during a long-range raid as part of Weapons and Tactics Instructor course 1-27, at Dugway Proving Ground, Utah, Oct. 7, 2026. WTI is a seven-week training event hosted by MAWTS-1 which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

ALT A U.S. Marine Corps MV-22B Osprey assigned to Marine Aviation Weapons and Tactics Squadron One, prepares to land during a long-range raid as part of Weapons and Tactics Instructor course 1-27, at Dugway Proving Ground, Utah, Oct. 7, 2026. WTI is a seven-week training event hosted by MAWTS-1 which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

U.S. Marines with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, disembark an MV-22B Osprey during a long-range raid as part of Weapons and Tactics Instructor course 1-27, at Dugway Proving Ground, Utah, Oct. 7, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

ALT U.S. Marines with Charlie Company, 3d Light Armored Reconnaissance Battalion, 1st Marine Division, disembark an MV-22B Osprey during a long-range raid as part of Weapons and Tactics Instructor course 1-27, at Dugway Proving Ground, Utah, Oct. 7, 2026. WTI is a seven-week training event hosted by Marine Aviation Weapons and Tactics Squadron One which emphasizes operational integration of the seven functions of Marine aviation in support of the Marine Air Ground Task Force, Joint and Coalition Forces. (U.S. Marine Corps photo by Sgt. Calah Thompson)

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#Marines with VMFA-314 embrace their families during a homecoming, Oct 1, 2026. Homecomings remind us that no Marine serves alone and highlighting military families’ resilience, sacrifice and support. @USMC 📸 LCpl. Peyton Gilliland #VMFA314 #USMC #NoMarineFightsAlone
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#Marines with 1stMEF and @MCIWPendletonCA hike during Tomahawk 22: Miles that Matter, Sept. 30, 2026. @USMC 🎨 by SSgt. James A. Guillory #IMEF #NoMarineFightsAlone
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#Marines with @imig_marines compete during HMMR Day, Oct. 1, 2026. The event celebrates I MIG's redesignation and builds camaraderie and readiness. #IMEF #HMMRDay #EspritDeCorps
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