I Marine Expeditionary Force
I MEF Logo
Ready. Engaged. Faithful.
Official U.S. Marine Corps Website

Mission

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. 

 

STRATMOBEX
1st Marine Division
Oct. 6, 2021 | 1:24
STRATMOBEX
1st Marine Division
Oct. 6, 2021 | 1:24
Player Embed Code:
Tags
More
STRATMOBEX
An EOTG Series: Boat Raid Course
I MIG Marines attend Innovation Bootcamp
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
REENLIST TODAY!
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
COVID-19 VACCINE FAQ
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
2/5 Fox Company conducts Stand-Down to Address Extremism in the Ranks
In Any Time and Place
Artemis Program
1st Marine Division 80th Anniversary
Artemis We Care
Photo Information

Lt. Col. Seth E. Anderson (right) passes the 1st Intelligence Battalion’s organizational colors to Lt. Col. B.J. Grass (left) during a change of command ceremony at Camp Pendleton, Calif. June 21, 2017. Grass was the executive officer at the Marine Corps Intelligence schools, Va., and Anderson will attend the U.S. Army War College in Carlisle, Pa. (U.S. Marine Corps photo by Lance Cpl. A. J. Van Fredenberg)

Photo by Lance Cpl. A. J. Van Fredenberg

1st Intelligence Battalion changes command

20 Jul 2017 | I MEF Headquarters Group

1st Intelligence Battalion welcomed a new battalion commander during a change of command ceremony at Camp Pendleton, California, June 21, 2017.

After two years of commanding the battalion, Lt. Col. Seth E. Anderson relinquished command of 1st Intelligence Battalion to Lt. Col. B.J. Grass.

The battalion conducts human and counter intelligence operations, which include data analysis, forensics and battlefield surveillance. I Marine Expeditionary Force Headquarters Group uses these assets both in garrison and while deployed on Special Purpose Marine Air Ground Task Forces and Marine Expeditionary Units.

“We are genuinely excited to have [Grass] here today to command these Marines,” said Col. Roberta Shea, commanding officer, I Marine Expeditionary Force Headquarters Group, who spoke at the ceremony. “Grass has led Marines in missions ranging from combat operations to humanitarian assistance, and we could not have asked for a better officer to lead this battalion.”

Anderson balanced the battalion’s budget of more than $2 million per year while supporting approximately 45 exercises and leading more than 600 Marines. He will move on to Carlisle, Pennsylvania, where he will attend the U.S. Army War College.

“It has been hard and challenging, but it has been fun,” Anderson said. “If the only complaints your Marines have about the battalion is they want to go to war, and they want more opportunities to lead, then you are doing something right.”

Grass has earned three master’s degrees and held billets as a platoon commander, series commander and intelligence officer throughout his 18-year career. He has also deployed to Iraq and Afghanistan and served with the 11th and 15th Marine Expeditionary Units.

Grass was most recently stationed at Marine Corps Intelligence Schools, Virginia Beach, Virginia where he served as the executive officer.

“I am honored and humbled to stand before you today as your battalion commander,” Grass said. “There is no question that this is the greatest personal honor in my professional career. Make no mistake, we will work hard and we will train hard to support the MEF and all of our deployed troops. I look forward to meeting and working with each and every one of you in the days ahead.”

I MEF Leaders

George W. Smith Jr.
Commanding General, I Marine Expeditionary Force

Read Biography

Brig. Gen. Ryan S. “Chick” Rideout
Deputy Commanding General, I Marine Expeditionary Force

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

Read Biography

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

Read Biography

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

Read Biography

CMDCM(FMF/SW/AW/IW) Toby A. Ruiz
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

Read Biography