180603-M-YR007-1084 PACIFIC OCEAN (June 3, 2018)Marines assigned to Marine Medium Tiltrotor Squadron (VMM) 166 (Reinforced), 13th Marine Expeditionary Unit (13th MEU), arm the weapon systems on an AH-1Z Viper at sea aboard the San Antonio-class amphibious transport dock USS Anchorage (LPD 23), June 3, 2018. The Essex Amphibious Ready Group (ARG) and 13th MEU are conducting Composite Training Unit Exercise (COMPTUEX), the final exercise before the units’ upcoming deployment. This exercise validates the ARG/MEU team’s ability to adapt and execute missions in ever-changing, unknown environments. Upon completion of COMPTUEX, the 13th MEU and Essex ARG will be certified as the nation’s premier forward-deployed, crisis response force, capable of executing missions across the broad spectrum of military operations. (U.S. Marine Corps photo by Cpl. Austin Mealy/Released)