I Marine Expeditionary Force (I MEF) was activated in Okinawa on Nov. 8, 1969, and was reassigned to Camp Pendleton on April 14, 1971.
I MEF is composed of I Marine Expeditionary Force, Headquarters Group, 1st Marine Expeditionary Brigade, 1st Marine Division, 3rd Marine Aircraft Wing, 1st Marine Logistics Group, and the 11th, 13th and 15th Marine Expeditionary units.
I MEF is expeditionary in nature, planning for and conducting worldwide missions across the entire spectrum of conflict, from humanitarian assistance to direct combat operations and major theater warfare. This versatility makes I MEF one of the premier forces in readiness in the United States military. The I MEF staff plans for, conducts and supervises the training of Marine Air-Ground Task Force elements as required to meet these contingency taskings. Furthermore, I MEF is charged with developing standing operating procedures for all aspects of Marine Air-Ground Task Force operations and for the promulgation of contingency and war plans.
In 2004, I MEF commanded 43,000 U.S. and United Kingdom forces in Iraq and Kuwait during Operation Iraqi Freedom II. In 2003, I MEF commanded more than 80,000 U.S. and U.K. forces in Iraq and Kuwait during Operation Iraqi Freedom. In addition, I MEF supported Operation Enduring Freedom in Afghanistan in 2002, participated in Operation Restore Hope in Somalia in 1993, and participated in operations Desert Shield and Desert Storm in Southwest Asia from 1990 to 1991.
Recently, I MEF has participated in Operation Iraqi Freedom and Operation Enduring Freedom.
Today, as a formidable organization within Marine Air-Ground Task Force concept, I MEF
task organizes 50,000 Marines and Sailors to conduct worldwide operations.