U.S. Navy Harpers Ferry-class dock landing ship USS Oak Hill participates in the Amphibious Squadron Marine Expeditionary Unit Integration Training in the vicinity of Camp Lejeune, North Carolina, July 14. - U.S. Navy Harpers Ferry-class dock landing ship USS Oak Hill participates in the Amphibious Squadron Marine Expeditionary Unit Integration Training in the vicinity of Camp Lejeune, North Carolina, July 14.