Marines from the 15th Marine Expeditionary Unit watch as the USS Rushmore leaves U.S. Naval Base Pearl Harbor, Hawaii, a week into the unit?s Western Pacific Deployment, Sept. 25. The MEU and Peleliu Amphibious Ready Group will continue their deployment, where they plan to conduct theater security cooperation exercises and humanitarian operations. - Marines from the 15th Marine Expeditionary Unit watch as the USS Rushmore leaves U.S. Naval Base Pearl Harbor, Hawaii, a week into the unit?s Western Pacific Deployment, Sept. 25. The MEU and Peleliu Amphibious Ready Group will continue their deployment, where they plan to conduct theater security cooperation exercises and humanitarian operations.