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U.S. Marines and Sailors with Combat Logistics Battalion 1, Marine Rotational Force – Darwin 25.3, as well as Australian Army soldiers with 1st Health Battalion, 2nd Health Brigade, conduct a mass casualty drill during Talisman Sabre 25 in the Northern Territory, Australia, July 21, 2025. The MASCAS drill enhances interoperability and readiness among U.S. Marines, Navy hospital corpsmen, and Australian Defence Force soldiers by conducting coordinated emergency medical response training in a simulated high-stress environment. Talisman Sabre is the largest bilateral military exercise between Australia and the United States advancing a free and open Indo-Pacific by strengthening relationships and interoperability among key allies and partners, while enhancing our collective capabilities to respond to a wide array of potential security concerns. (U.S. Marine Corps photo by Sgt. Brian A. Stippey)