The newly formed MSB will assume the responsibilities of administrative support to the I MEF Command Element to better posture the I MEF Information Group to focus on leading in the information environment. - Marines with I Marine Expeditionary Force Support Battalion march in formation during the MSB activation ceremony on Camp Pendleton, Calif., April 11, 2018. The newly formed MSB will assume the responsibilities of administrative support to the I MEF Command Element to better posture the I MEF Information Group to focus on leading in the information environment. (U.S. Marine Corps photo by Cpl. Jacob A. Farbo)