180401-M-NZ408-0019 U.S. 5TH FLEET AREA OF OPERATIONS (April 1, 2018) Marines and Sailors assigned to the 26th Marine Expeditionary Unit (26th MEU) and Amphibious Ready Group 4, celebrate aboard the Harpers Ferry-class dock landing ship USS Oak Hill (LSD 51). Oak Hill is deployed to reassure allies and partners and preserve the freedom of navigation and the free flow of commerce in the region. (U.S. Marine Corps photo by Cpl. Austin Livingston/Released)