U.S. Marines with 2nd Battalion, 1st Marine Regiment, with Marine Rotational Force – Darwin 25.3, prepare to board an MV-22B Osprey assigned to Marine Medium Tiltrotor Squadron (VMM) 363, MRF-D, during Exercise Southern Jackaroo at Townsville Field Training Area, Queensland, Australia, May 28, 2025. - U.S. Marines with 2nd Battalion, 1st Marine Regiment, with Marine Rotational Force – Darwin 25.3, prepare to board an MV-22B Osprey assigned to Marine Medium Tiltrotor Squadron (VMM) 363, MRF-D, during Exercise Southern Jackaroo at Townsville Field Training Area, Queensland, Australia, May 28, 2025. Southern Jackaroo is an annual exercise held between the U.S. Marine Corps, Australian Defence Force, and Japanese Ground Self Defense Force designed to enhance interoperability and combined readiness with Allies and partners. MRF-D is an annual six-month rotational deployment to enhance interoperability with the Australian Defence Force and allies and partners and provide a forward postured crisis response force in the Indo-Pacific. (U.S. Marine Corps photo by Cpl. Angelina Sara)