The U.S. Navy has launched a major new presence in the Indo-Pacific with the activation of a naval support activity in Western Australia, a clear sign that the United States is anchoring its long-term military strength in the region.
The move adds to the growing momentum of the AUKUS alliance, tightening bonds between the U.S., the United Kingdom, and Australia as all three prepare for a new era of great power competition at sea.
Announced on May 30, the new command—Naval Support Activity Stirling, or NSA Stirling—will serve as the backbone for Submarine Rotational Force–West, known as SRF–West.
The base will provide essential support for rotating U.S. and British nuclear-powered submarines stationed at Australia’s HMAS Stirling near Perth, a critical location overlooking key sea routes across the Indo-Pacific.
The new installation falls under Pillar I of the AUKUS pact, the agreement designed to bolster joint security operations and deliver Australia its first conventional, nuclear-powered submarines.
As part of the expansion, the U.S. Navy confirmed that NSA Stirling will deliver critical logistics and family services for American personnel, contractors, and sailors assigned to the growing presence in the Pacific theater.
Vice Adm. Scott Gray, commander of Navy Installations Command, said the base represents a pivotal milestone for American force projection. “Establishment of NSA Stirling with our AUKUS partners demonstrates our command mission to support the fleet, warfighter, and family,” Gray stated.
“By providing essential services to U.S. personnel and their families, NSA Stirling will enhance rotational submarine force readiness.”
The first deployments of American submariners and their families are expected in late 2026, ahead of full operational capability projected in 2027. The U.K. will also send personnel as part of the same rotational force, complementing an already robust joint-submarine training pipeline between the three allies.
Rear Adm. Ian Johnson, commander of Navy Region Japan, noted that the new facility is still in the early stages but progressing quickly. “While there is still much work ahead, we are confident in our ability to accomplish this task through strong collaboration with our AUKUS partners,” Johnson said.
His command began the stand-up process in October 2024, with infrastructure and community support efforts rapidly taking shape.
This development follows a broader U.S. strategic focus to expand forward-operating capacities across critical nodes in the Indo-Pacific—steps that were often delayed under the politically cautious foreign policy of the previous administration.
By contrast, this new War Department initiative under President Trump’s team, led by War Secretary Pete Hegseth, is moving full speed ahead to put hard military power in position before China can exploit regional vacuums.
On the same day NSA Stirling was activated, Secretary Hegseth met in Singapore with Australian Deputy Prime Minister and War Minister Richard Marles, as well as U.K. War Secretary John Healey.
