U.S. Marines receive a briefing before a platoon assault exercise on Arta Range, Djibouti, Feb. 10, 2014. The Marines are assigned to Alpha Company, 13th Marine Expeditionary Unit. The unit is deployed with the Boxer Amphibious Ready Group as a theater reserve and crisis response force throughout the U.S. 5th Fleet area of responsibility. U.S. Marines receive a briefing before a platoon assault exercise on Arta Range, Djibouti, Feb. 10, 2014. The Marines are assigned to Alpha Company, 13th Marine Expeditionary Unit. The unit is deployed with the Boxer Amphibious Ready Group as a theater reserve and crisis response force throughout the U.S. 5th Fleet area of responsibility. SHARE: Download: Full Size (2.02 MB) Tags: photo essays Credit: VIRIN: 198914-P-IWP89-385.jpg Photo Gallery