U.S. Marines and Sailors with the 13th Marine Expeditionary Unit and Boxer Amphibious Ready Group man the rails aboard the USS Boxer, Joint Base Pearl Harbor-Hickman Pier, August 29, 2016. The 13th MEU, embarked on the Boxer Amphibious Ready Group, is operating in the U.S. 3rd Fleet area of operations in support of security and stability in the Pacific region. - U.S. Marines and Sailors with the 13th Marine Expeditionary Unit and Boxer Amphibious Ready Group man the rails aboard the USS Boxer, Joint Base Pearl Harbor-Hickman Pier, August 29, 2016. The 13th MEU, embarked on the Boxer Amphibious Ready Group, is operating in the U.S. 3rd Fleet area of operations in support of security and stability in the Pacific region.