PACIFIC OCEAN (April 21, 2021) Marines assigned to the Marine Medium Tiltrotor Squadron (VMM) 165 (Reinforced), 11th Marine Expeditionary Unit, test the rotor blades of a CH-53E Super Stallion on the flight deck of the amphibious transport dock USS Portland (LPD 27). Portland is underway as part of the Essex Amphibious Ready Group (ARG) conducting routine training 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 2nd Class Devin Kates)