JUNE 4, 2026 – Exercise Southern Jackaroo 2026 officially commenced today following an opening ceremony that brought together forces from the United States, Australia, and Japan. Scheduled from May 29 to July 3, 2026, the exercise serves as a premier training venue to build a cohesive, multi-national force capable of operating seamlessly across the Indo-Pacific’s complex environments.
Throughout the exercise, U.S. Marines and Sailors assigned to 1st Battalion, 5th Marine Regiment and Combat Logistics Battalion 5, both with Marine Rotational Force – Darwin 26, will work alongside the Australian Defence Force’s 3rd Brigade, as well as maneuver elements from the U.S. Army and Japan Self Defense Force.
The primary focus of this year’s exercise is interoperability advancement. By actively aligning communications, tactics, and procedures during rigorous field training, participating nations are eliminating friction points and building a seamless allied force. This integration ensures that U.S., Australian and Japanese forces are ready to respond to regional challenges as a unified front in any future crisis.
In addition to interoperability, Southern Jackaroo 2026 is designed to test and prove combined arms integration. Participating forces will execute a demanding progression of training, including force-on-force offensive and defensive operations, mounted machine-gun gunnery, and mortar employment.
Through these coordinated live-fire attacks and mounted maneuvers, multinational forces will demonstrate their ability to synchronize fires, maneuver, and effects to achieve a distinct and decisive battlefield advantage. The exercise will culminate in a multi-national combined arms live-fire exercise.
“Exercise Southern Jackaroo enhances our collective capability by integrating U.S. Marines alongside our allies in realistic, demanding scenarios. By practicing how we communicate and work together on the ground, we ensure that our combined forces maintain a high state of combat readiness and a decisive tactical edge.” Lt. Col. Mark Saville, commanding officer of 1st Bn., 5th Marines.
Exercise Southern Jackaroo 2026 brings together U.S. Marines, Sailors, and Soldiers, the Australian Defence Force and Japan Self Defense Force for a month-long, multi-national training event. The exercise focuses on advancing combined arms integration and tactical interoperability through rigorous live-fire scenarios, ensuring these allied militaries can operate seamlessly as a unified front across the Indo-Pacific.
1st Lt. Chase Fortier
Marine Rotational Force – Darwin