The 1st Marine Division
Headquartered at Marine Corps Base Camp Pendleton, Calif., the 1st Marine Division is a multi-role, expeditionary ground combat force. The Division is employed as the ground combat element of I Marine Expeditionary Force or may provide task-organized forces for assault operations and such operations as may be directed. The 1st Marine Division provides amphibious forcible entry capability to the naval expeditionary force and conducts subsequent land operations in any environment.
The Division provides fully trained units and personnel in support of Marine Rotational Force - Darwin, Marine Expeditionary Units, and the Unit Deployment Program to Okinawa, Japan.
Headquarters Battalion
Headquarters Battalion provides command and administration for the 1st Marine Division. Within the Battalion are Headquarters and Service Company, Communications Company, and Truck Company. The Division headquarters is located at mainside, while Headquarters Battalion and its companies are located at Camp Margarita.