180918-N-SF508-0031 PEARL HARBOR (Sept. 18, 2018) The Royal Australian Navy air warfare destroyer HMAS Hobart (DDG 93) arrives at Joint Base Pearl Harbor-Hickam as part of the 100 Years of Mateship celebration between the United States and Australia. 2018 marks the 100th anniversary of the first time U.S. and Australian troops fought side by side in an offensive action, at the Battle of Hamel on France’s Western Front during World War I. (U.S. Navy photo by Mass Communication Specialist 2nd Class Charles Oki/Released)