I Marine Expeditionary Force
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Official U.S. Marine Corps Website


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. 


1st LAR Unitas 2021
1st Marine Division
Oct. 27, 2021 | 2:44
1st LAR Unitas 2021
1st Marine Division
Oct. 27, 2021 | 2:44
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1st LAR Unitas 2021
3/4 Always Training Always Ready
Resilience Seminar
An EOTG Series: Boat Raid Course
I MIG Marines attend Innovation Bootcamp
Red Patch
13th MEU UET
7th Engineer Support Battalion Squad Competition
7th Engineer Support Battalion Squad Competition
11th Marines FIREX: The King of Battle
Mechanized Raid Course
Recon Ex: Working Hand in Hand
1st Medical Battalion En Route Care
Super Squad 21
1st LSB Conducts Parachute Operations
Why I Reenlisted: Sgt. Asia Schmitz
Chapter 3: Readiness
Covid-19 Q&A with CDR Gilstrap
Introduction to Super Squad 21
Career Retention Commanding Generals Delegation of Authority
Introduction to Super Squad 21
U.S. Marines Conduct Air Delivery Operations
An EOTG Series: TRAP Course
Vaccines Still Prevent The Spread Of COVID-19
Message to the Brigade of Midshipmen from 1st MARDIV
Covid Vaccine and the Second Shot
35XX First-Term Reenlistment Incentives
Range 800 Opening
Vaccines Can Protect Against the Delta Variant
Why I Reenlisted - Cpl. Smith
Super Squad 21 Teaser
1st Marine Division Band Performs "Waltzing Matilda"
I MIG Change of Command
How to Schedule a “Shot Ex”
Why We Chose To Vaccinate Our Children
1/5 Return to Water Operations Part 1: Crawl
1/5 Return to Water Operations Part 1: Crawl
Return to water operations
Vaccine Benefits: What's In It For Me?
En Route Care
Like Father, Like Son: Sgt. Trevon Wade
Like Father, Like Son: MGySgt (Ret.) Steve Payne
Like Father, Like Son: 1st Lt. Stefawn Payne
1st Tank Battalion Deactivation Ceremony
Bronze Star Awards Ceremony
I MEF/MCI West Navy Marine Corps Relief Society
2/11 Fitness Seminar
Photo Information

Marines from across I Marine Expeditionary Force post security during fast rope inserts on Marine Corps Base Camp Pendleton, Calif. May 9, 2016. This training was a part of a helicopter rope suspension techniques training package facilitated by 1st Air Naval Gunfire Liaison Company, I MEF. Marines and Royal British Commandos practiced these techniques on a rappel tower prior to fast roping out of helicopters hovering nearly 40 feet off the ground.

Photo by Cpl. Jonathan Boynes

Helicopter rope suspension technique masters teach Marines fundamentals of fast roping

13 May 2016 | Cpl. Jonathan Boynes I Marine Expeditionary Force

Succeeding in environments where others have failed is both a point of pride for the Marine Corps, but also a well-known staple of the service which has helped to maintain its relevancy from inception up to the modern-day battlefields of the 21st century. 

Training to keep pace with the demanding tempo of today’s conflicts is no easy task and the need for a versatile, effective force is as great as ever. Fortunately, the instructors of 1st Air Naval Gunfire Liaison Company, I Marine Expeditionary Force, make it a point to pass helicopter rope suspension techniques to their students. 

Fast roping was the focus of their training on May 9, 2016, and it all started at the base of a rappel tower on Marine Corps Base Camp Pendleton, Calif. It was here that the instructors began guiding dozens of students from across I MEF through techniques which eventually would lead them to rappel from helicopters hovering nearly 40 feet off the ground later in the day. 

Though HRST is a difficult and unique collection of skillsets to master, the payoff is well worth the effort invested into the training. It helps broaden the already expansive organic operational capabilities of the Marine Corps as well as showcasing the expeditionary nature of the force. 

“HRST allows us to insert or extract from areas that normally would be inaccessible through regular means of transportation,” said Sgt. Kurtis Gagnon, a training chief with 1st ANGLICO. “This gives us a huge edge in a lot of different scenarios. We can insert directly onto objectives, it’s safer for us, and far more devastating for the enemy.” 

To develop and maintain this advantage in combat, the Marine Corps trains dedicated and knowledgeable instructors ready to take on the challenge of teaching high-risk and in-depth techniques. 

Marines also enhanced interoperability by training with British Royal Marine Commandos. This is important, because when Marines deploy they are often accompanied by partner nations. 

ANGLICO must meet the needs of the Marine Corps through liaising with America’s allies and other friendly forces making it a unique asset. 

“There is a lot of pressure on the instructors and I to provide students with the best training possible,” said Capt. Eric Vanhorn, a firepower control team leader, 1st ANGLICO. “I have to trust that the HRST school is maintaining the reputation that it has built by putting out properly trained HRST masters who are able to pass on what they have learned. I have yet to see failure.” 

The Marine Corps’ training is time-tested and has been proven to work. Its instructors know this through experience and the world knows it through the battles they’ve won. HRST is only a small sample of the Corps’ capabilities, but it’s an accurate testament to expeditionary spirit which permeates all that it does.

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George W. Smith Jr.
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Brigadier General Rideout assumed duties as Deputy Commanding General, I Marine Expeditionary Force in July 2021. His previous assignment was serving as Director, Military Advisor Group, Combined Joint Task Force - Operation INHERENT RESOLVE based in Baghdad, Iraq from June of 2020 to June 2021. Fleet Marine Force assignments include: Commanding

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Colonel Brian Rideout
Chief of Staff, I Marine Expeditionary Force

Colonel Rideout holds a baccalaureate degree in Psychology from Ohio Wesleyan University, a Master of Science in Information Technology Management from the Naval Postgraduate School, a Master of Military Studies from Marine Corps University and a Master of Arts in National Security and Strategic Studies from the Naval War College.  He is a graduate

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Sgt. Maj. Terrence C. Whitcomb
Sergeant Major, I Marine Expeditionary Force

Sergeant Major Whitcomb began Marine Corps Recruit Training on 14 September 1993 at Marine Corps Recruit Depot, San Diego, California with Company C, 1st Recruit Training Battalion.  He was meritoriously promoted to Private First Class and graduated Recruit Training on 10 December 1993. Following graduation from Recruit Training, Private First

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Command Master Chief

 Though a native of Montebello, California, Master Chief Ruiz calls Monte Vista, Colorado home.  He enlisted in the Navy in March 1991, reported to basic training at RTC Great Lakes, Illinois and completed Signalman “A” School at NTC Orlando, Florida.  After serving two tours as a collateral-duty Command Career Counselor in 2000 and 2003, he became

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I Marine Expeditionary Force