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America operates with a detachment of F-35s from Marine Fighter Attack Squadron (VMFA) 121, which reinforce rotary-wing and tiltrotor aircraft from Marine Medium Tiltrotor Squadron (VMM) 265 as part of the 31st Marine Expeditionary Unit (MEU). America also fields a detachment of MH-60S Sea Hawks from Helicopter Sea Combat Squadron (HSC) 25. Queen Elizabeth deployed with F-35s from U.S. Marine VMFA-211 and Royal Air Force No. 617 Squadron.