Marines from 3rd Battalion, 1st Marine Regiment, 15th Marine Expeditionary Unit arrived ashore at Arta Beach, Djibouti, July 20, 2015, for two weeks of sustainment training to maintain and enhance the skills they developed during their pre-deployment training period. The 15th MEU is currently deployed in support of maritime security operations and theater security cooperation efforts in the U.S. 5th and 6th Fleet areas of operation.