PACIFIC OCEAN (May 18, 2021) Sailors refuel an AH-1Z Viper, attached to Marine Medium Tiltrotor Squadron (VMM) 165 (Reinforced), on the flight deck of amphibious assault ship USS Essex (LHD 2). Essex is underway as part of the Essex Amphibious Ready Group (ARG) conducting integrated training with the 11th MEU off the coast of southern California. Together, the 11th MEU, Amphibious Squadron (PHIBRON) 1, and ships are designated as an ARG. (U.S. Navy photo by Mass Communication Specialist 3rd Class Brett McMinoway)