I Marine Expeditionary Force

This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (March 2018) (Learn how and when to remove this message)

I Marine Expeditionary Force
I MEF insignia
Active	8 November 1969 – present
Country	United States of America
Branch	United States Marine Corps
Type	Marine Air-Ground Task Force
Role	Expeditionary combat force
Part of	U.S. Marine Forces Pacific
Garrison/HQ	MCB Camp Pendleton, California, U.S.
Engagements	Operation Desert Storm Global War on Terrorism Operation Enduring Freedom Iraq War Invasion of Iraq First Battle of Fallujah Second Battle of Fallujah
Commanders
Current commander	LtGen Michael S. Cederholm
Notable commanders	Gen Joseph F. Dunford, Jr., Gen Anthony Zinni, Gen Michael Hagee, Gen James T. Conway, Gen James Mattis, Gen John F. Sattler

The I Marine Expeditionary Force ("I" pronounced "One") is a Marine Air Ground Task Force (MAGTF) of the United States Marine Corps primarily composed of the 1st Marine Division, 3rd Marine Aircraft Wing, and 1st Marine Logistics Group. It is based at Marine Corps Base Camp Pendleton.

I Marine Expeditionary Force is the largest of the three MEFs in the Fleet Marine Force and is often referred to as the "Warfighting MEF" for its consistent involvement and contributions in major armed conflicts. It is presently commanded by Lieutenant General Michael Cederholm. The deputy commander is Brigadier General Robert C. Fulford.