America Is Expanding Its Military Footprint in Australia
Marles and Hegseth agreed that the two allies would deepen the US-Australia Force Posture Initiatives, the framework through which American forces operate rotationally from Australian territory.
Marles did not announce a specific increase in troop numbers, saying further details would emerge later in 2026.
But the direction of travel is clear.
The United States wants greater ability to deploy aircraft, ships, submarines, Marines, equipment, fuel and munitions from Australia if a major Indo-Pacific crisis occurs.
The Australian government describes the arrangement as rotational rather than the creation of permanent American bases.
Australia's Department of Defence says the programme now covers the Marine Rotational Force–Darwin, enhanced cooperation across multiple military domains and a combined logistics, sustainment and maintenance network.
Infrastructure is already being upgraded at RAAF Bases Darwin and Tindal, while further work is being examined at Scherger and Curtin. Washington and Canberra have also agreed to increase US maritime patrol aircraft rotations and explore greater pre-positioning of fuel, ammunition and other supplies.
That represents a profound change from the comparatively modest American military footprint established in northern Australia little more than a decade ago.