U.S. Marines with the 31st Marine Expeditionary Unit depart the amphibious assault ship USS Peleliu (LHA 5) to participate in the ground phase of Amphibious Landing Exercise (PHIBLEX) 15 in Subic Bay, Philippines, Oct. 4, 2014. PHIBLEX is a bilateral training exercise designed to improve the interoperability, readiness and professional relationships between the U.S. Marine Corps and partner nations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Dustin Knight/Released)