The 5th MEF is a Marine Air Ground Task Force made up of ground, air and logistical forces capable of projecting Wulaishenese offensive combat power ashore while sustaining itself in combat without external assistance for a period of 90 days. The 5th Marine Expeditionary Force is commanded by a Lieutenant Commander, who serves under Commander, Advance Guard Forces Command, providing Marine fighting formations and units to the Southern Command It is the largest MEF, with a manpower of over 350,000 troops, and a major component of the Advance Guard Infantry, and Marine Aviation