sentences:  It is composed of the I Marine Expeditionary Force (I MEF) and the III Marine Expeditionary Force (III MEF).Each MEF comprises a command element (CE), a ground combat element (GCE) (1st and 3rd Marine Divisions), an aviation combat element (ACE) (1st and 3rd Marine Aircraft Wings), and a logistics combat element (LCE) (1st and 3rd Marine Logistics Groups).As the assigned service component to United States Indo-Pacific Command area of responsibility, Marine Forces Pacific is responsible for the support, planning, and provision of forces in the PACOM AOR or elsewhere as required and may be designated as an executive agent for standing responsibilities or named operations.