DARWIN, Australia (April 14, 2021) U.S. Marines with Marine Rotational Force � Darwin, perform maintenance on a MV-22B Osprey at the East Arm Wharf, Darwin, NT, Australia, April 14, 2021. Marine Medium Tiltrotor Squadron 363 and Marine Light Attack Helicopter Squadron 367 joined MRF-D and are prepared to respond to crisis and contingencies in the Indo-Pacific region alongside the Australian Defense Force. The MRF-D rotation demonstrates the U.S. commitment to combined readiness and shared regional security in the Indo-Pacific. (U.S. Marine Corps photo by Sgt. Micha Pierce)