The United States Navy has set up a new support hub in Western Australia, and the move signals a deeper American military footprint near Perth.
Quick Take
- The United States Navy established Naval Support Activity Stirling in Perth on May 30 as part of AUKUS.[4]
- The new activity will support Submarine Rotational Force-West and the rotational presence of United States and United Kingdom submarines.[4]
- The Navy says the site will provide housing, health care, child care, and other services for personnel and families.[4]
- Official military posts describe the stand-up as a major milestone for AUKUS and allied submarine cooperation.[2][5]
What the Navy Just Put in Place
According to the Department of War, Naval Support Activity Stirling was established in Perth, Western Australia, as part of AUKUS.[4] The Navy says the support activity will serve United States service members, civilian workers, contractors, and families tied to Submarine Rotational Force-West.[4] The same announcement says the facility will support the rotational presence of United States and United Kingdom nuclear-powered fast-attack submarines at HMAS Stirling.[4]
The Navy also says the support hub is meant to improve readiness, not just handle paperwork.[4] Officials say it will connect personnel to housing, health care, child care, and recreation during their assignment.[4] Navy Region Japan was tasked in October 2024 to stand up the activity, which shows the plan was built well before the public launch.[4]
Why Supporters Call It a Milestone
United States Indo-Pacific Command and Navy social media accounts describe the move as a major step for AUKUS.[2][5] The Pacific Command account said the submarine tender USS Emory S. Land’s port visit marked an AUKUS Pillar 1 milestone, showing the support network is already being used.[6] That matters because the more often submarines and support ships cycle through a location, the more permanent the posture begins to look.[6]
Australia’s own defense plans point in the same direction. The Australian Defence project page says AUKUS partners are expected to have a rotational presence at HMAS Stirling from as early as 2027, including one United Kingdom submarine and up to four United States submarines.[7] That schedule shows this is not a short-term visit. It is part of a long buildout that will place more allied military power near Western Australia.[7]
Why Critics Are Watching Closely
For many Americans, the concern is simple: support hubs often become lasting military footholds. The official record says NSA Stirling is a support activity, but it also ties the site to repeated submarine rotations and increased allied presence.[4][5] That gives critics reason to ask whether the language of “support” hides a bigger shift in strategy and posture, even if the Navy presents it as an administrative step.[4][5]
Why is Marles hiding the US declaration of their new military base near Perth?
It is officially named:
US Naval Support Activity StirlingOr in other words:
US Naval Base Stirling https://t.co/NSatfAAzwO pic.twitter.com/nSoaT8HglY— Peter Cronau (@PeterCronau) June 11, 2026
The public record does not show a direct security crisis caused by the stand-up itself.[4][6][7] It does show a clear pattern of expansion, planning, and alliance coordination.[4][5][6][7] That leaves the real debate where it belongs: whether this buildout strengthens deterrence, or whether it drags the United States deeper into another overseas posture that taxpayers and military families will be expected to carry.[4][7]
Sources:
[2] Web – Navy Establishes NSA Stirling in Australia – Department of War
[4] Web – As part of the trilateral Australian, United Kingdom, and … – …
[5] Web – U.S. Submarine Maintenance Period Demonstrates Forward …
[6] X – US Indo-Pacific Command
[7] Web – U.S. Submarine Tender to Support AUKUS Pillar 1 Milestone – PACOM
