Australia’s increasingly close military partnership with the United States is intensifying debate over whether the country risks being drawn into conflicts beyond its control as geopolitical tensions escalate.
The issue has come into sharper focus following confirmation that Australian Defence Force personnel were aboard a United States submarine that sank an Iranian warship during recent hostilities in the Middle East.
Prime Minister Anthony Albanese said three Australians were on the vessel as part of a training program linked to the AUKUS defence pact between Australia, the United States and the United Kingdom.
The government said the Australian personnel did not participate in the attack itself.
The submarine strike sank the Iranian frigate IRIS Dena in the Indian Ocean, killing at least 87 sailors. Thirty-two survivors were later rescued by the Sri Lankan navy.
The incident has highlighted the depth of Australia’s military integration with the United States, which has expanded significantly over the past two decades.
Under AUKUS, Australia plans to acquire nuclear-powered submarines and increase cooperation with US and British defence forces across a range of advanced military technologies.
The agreement represents one of the largest defence investments in Australia’s history and will tie Australia’s military planning closely to that of the United States for decades.
But some analysts say the arrangement increases the likelihood that Australia could become involved in conflicts driven by US strategic decisions.
Dr Lachlan Strahan, a former Australian high commissioner and author of The Curious Diplomat, said many US allies were unsettled by the way recent military actions had unfolded.
“Everyone among the traditional US allies is discomforted by what has happened,” Strahan said.
He said the unpredictability of US foreign policy decisions created challenges for allied governments trying to manage their own strategic interests.
Australia now faces a difficult diplomatic balancing act: maintaining its alliance with Washington while also preserving the ability to express disagreement with American military actions.
“Can we still stand up for things we believe in without getting into a brawl with the United States?” Strahan said.
Australia’s defence cooperation with the United States extends far beyond AUKUS.
The Australian government has committed $1.6bn to upgrade RAAF Base Tindal in the Northern Territory so it can support US bomber aircraft capable of carrying nuclear weapons.
The Pine Gap intelligence facility in central Australia continues to play a central role in US global surveillance and targeting operations, while the presence of US Marines rotating through Darwin has steadily expanded.
Critics say the growing network of joint military infrastructure and embedded personnel has structurally tied Australia’s defence posture to US strategic priorities.
Supporters argue the alliance remains the cornerstone of Australia’s national security and is essential to maintaining stability in the Indo-Pacific.
As tensions rise in the Middle East and elsewhere, analysts say the challenge for Australian policymakers will be maintaining the benefits of the US alliance while preserving independent decision-making in matters of war and peace.
