A MH-60S Seahawk carries supplies to be dropped aboard USS Mesa Verde (LPD 19) during a vertical replenishment for the Amphibious Ready Group Marine Expeditionary Unit Exercise Dec. 8, 2016. During the three-week training evolution, Marines will tackle a wide range of operations and scenarios enhancing interoperability and amphibious warfare capabilities with their Navy counterparts. Replenishment at sea is vital for the Bataan Amphibious Ready Group to sustain itself while underway. (U.S. Marine Corps photo by Cpl. Brianna Gaudi)