U.S. Marine Corps Lance Cpl. Justin A. Green, a field radio operator with the 7th Communication Battalion, III Marine Expeditionary Force Headquarters Group, climbs a mountainside March 18, 2014, during a mountain warfare training course as part of Marine Expeditionary Force Exercise (MEFEX) 2014 in Pohang, South Korea. MEFEX 2014 was a U.S. Marine Corps Forces Pacific-sponsored series of exercises between the U.S. Navy and Marine Corps and South Korean forces. Among the exercises were the Korean Marine Exchange Program, Freedom Banner 14, Ssang Yong 14, Key Resolve 14 and the Combined Marine Component Command 14 command post exercise.