Australia war-games use of nuclear-powered submarines in simulated China conflict

Three-day exercise in Canberra models regional conflict under AUKUS agreement

By LineZotpaper
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The Australian Defence Force is participating in war games this week that simulate a regional conflict with China and the use of nuclear-powered submarines to be acquired under the AUKUS pact, according to a report from The Age. The three-day exercise, run by the Washington-based Hudson Institute and the United States Studies Centre, brings together ADF personnel alongside US and Japanese military officers and civilian experts.

The tabletop exercise, titled "Defending Australia in a Post-Dominance World," is being conducted in Canberra at the government's Joint Experimentation and Wargaming Laboratory. Bryan Clark, director of the Centre for Defence Concepts and Technology at the Hudson Institute, told The Age that half of the participants came from the ADF, while US and Japanese military personnel made up a quarter, and the rest were civilian experts.

"We're paying for it, we're sponsoring it, they're participating," Clark said. "We give them the entire ADF to play with," as well as the US nuclear-powered submarines due to rotate through Submarine Rotational Force (West) near Perth from next year. He added that if Australia comes under attack, these submarines would be pressed into service to defend Australia.

"What we want to see is how do the teams use these submarines along with the rest of the resource, and what's the most valuable mission they could be doing," Clark said.

Clark expressed concern that the Australian government had not convinced the public of the utility of AUKUS and the nuclear-powered submarines, which Australia is due to acquire three of from the US starting in 2032, before building a new AUKUS-class submarine with the UK. "I feel like the ADF, the Australian government, hasn't made the case for how they would use them and why it's important to buy them," he said.

Jennifer Parker, an adjunct professor at the University of Western Australia and a defence and security expert, noted that the ADF always conducts war games. "They would be regularly war-gaming the most dangerous scenario for our region ... this would likely include the prospect of regional conflict," she said. Parker said her impression was that ADF senior leadership was deeply concerned about the prospect of a major conflict in the coming years, and that there was a deep disconnect between thinking in the ADF and public understanding of the risk.

A Department of Defence spokesperson confirmed that a small cohort of ADF personnel were taking part in the exercise, saying "Defence routinely engages in simulated tabletop exercises, aiming to enhance operational understanding and capabilities with our partners."

The war games come a year after US President Donald Trump affirmed that AUKUS was "full steam ahead" during Prime Minister Anthony Albanese's official visit to the White House.

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Analysis

Why This Matters

  • The exercise signals the AUKUS partnership moving from planning to military practice, as US nuclear-powered submarines begin rotations near Western Australia from next year.
  • A simulated conflict with China underscores the seriousness with which Australian, US and Japanese militaries regard potential confrontation in the Indo-Pacific.
  • The disconnect between ADF concerns and public understanding, highlighted by Clark and Parker, points to a potential political challenge for the government as it prepares to spend tens of billions on nuclear-powered submarines.

Background

AUKUS, announced in 2021, is a trilateral security partnership between Australia, the United Kingdom and the United States. Under the pact, Australia is to acquire three Virginia-class nuclear-powered submarines from the US from 2032, before jointly building a new class of submarine with the UK. The US Navy will rotate submarines through a base near Perth from 2027. Think tank-led war-gaming is common in the US, and the Hudson Institute previously ran an exercise in Canberra in 2024 focused on uncrewed systems.

Key Perspectives

[Australian Defence Force]: The ADF is participating in the exercise to enhance operational understanding with partners, according to a Defence spokesperson. Clark described the ADF as actively using the war game to explore how to deploy nuclear-powered submarines in a conflict scenario. [Hudson Institute and US Studies Centre]: The think tanks running the exercise aim to model how existing and future military assets, particularly US submarines, would be used to defend Australia in a conflict with China. Clark said the exercise tests the most valuable missions for these submarines. [Sceptics and the public]: Clark and Parker both raised concerns that the Australian public has not been adequately briefed on the rationale for AUKUS or the risks of conflict. Parker noted a deep disconnect between ADF leadership and public awareness, which could affect support for the multi-billion-dollar submarine program.

What to Watch

  • The conclusions of the war game and whether they shape ADF operational planning or public messaging about AUKUS.
  • The arrival of US nuclear-powered submarines at Submarine Rotational Force (West) near Perth next year and any related political or diplomatic reactions.
  • The Australian government's efforts to make the case for AUKUS to the public as spending commitments approach.

Sources

Checked

12 claims in this story checked against 1 source: 11 supported.

Show each claim
  1. SupportedAustralia war-games use of nuclear-powered submarines in simulated China conflictThe Age - Latest News: “Australia war-gaming use of nuclear-powered subs in conflict with China”
  2. SupportedThree-day exercise in Canberra models regional conflict under AUKUS agreementThe Age - Latest News: “war games are being run in Canberra over three days”
  3. SupportedThe three-day exercise, run by the Washington-based Hudson Institute and the United States Studies Centre, brings together ADF personnel alongside US and Japanese military officers and civilian expertsThe Age - Latest News: “The war games are being run in Canberra over three days by the Washington-based Hudson Institute ... along with the United States Studies Centre”
  4. Not in the sourcesThe tabletop exercise, titled 'Defending Australia in a Post-Dominance World,' is being conducted in Canberra at the government's Joint Experimentation and Wargaming LaboratoryThe Age - Latest News: “The Hudson Institute has run war games in Canberra previously, such as a 2024 activity focused on uncrewed systems, held at the government’s Joint Experimentation and Wargaming Laboratory.”
  5. SupportedBryan Clark told The Age that half of the participants came from the ADF, while US and Japanese military personnel made up a quarter, and the rest were civilian expertsThe Age - Latest News: “Bryan Clark... said half the participants came from the ADF, while US and Japanese military personnel made up a quarter, and the rest were civilian experts”
  6. Supported"We're paying for it, we're sponsoring it, they're participating"The Age - Latest News: “We’re paying for it, we’re sponsoring it, they’re participating”
  7. Supported"We give them the entire ADF to play with," as well as the US nuclear-powered submarines due to rotate through Submarine Rotational Force (West) near Perth from next yearThe Age - Latest News: “We give them the entire ADF to play with”, as well as the US nuclear-powered submarines that are due to rotate through Submarine Rotational Force (West) near Perth from next year”
  8. Supported"If Australia comes under attack, these submarines would be pressed into service to defend Australia"The Age - Latest News: “If Australia comes under attack, these SRF submarines are going to be pressed into service to defend Australia because they’re already there, and we have an alliance relationship, obviously”
  9. SupportedClark expressed concern that the Australian government had not convinced the public of the utility of AUKUS and the nuclear-powered submarines, which Australia is due to acquire three of from the US starting in 2032, before building a new AUKUS-class submarine with the UKThe Age - Latest News: “Clark, speaking in Washington this month, worried Australia was yet to convince the public of the utility of AUKUS ... Under AUKUS, Australia is due to acquire three nuclear-powered submarines from the US, starting in the year 2032, before building a new AUKUS-class nuclear-powered submarine with the United Kingdom”
  10. Supported"I feel like the ADF, the Australian government, hasn't made the case for how they would use them and why it's important to buy them"The Age - Latest News: “I feel like the ADF, the Australian government, hasn’t made the case for how they would use them and why it’s important to buy them”
  11. SupportedJennifer Parker noted that the ADF always conducts war games, and that they would be regularly war-gaming the most dangerous scenario for our region, likely including the prospect of regional conflictThe Age - Latest News: “Defence and security expert Jennifer Parker, an adjunct professor at the University of Western Australia, noted the Defence Force always conducted war games. “They would be regularly war-gaming the most dangerous scenario for our region ... this would likely include the prospect of regional conflict””
  12. SupportedThe war games come a year after US President Donald Trump affirmed that AUKUS was "full steam ahead" during Prime Minister Anthony Albanese's official visit to the White HouseThe Age - Latest News: “The war games come exactly a year after US President Donald Trump affirmed AUKUS was “full steam ahead” during Prime Minister Anthony Albanese’s official visit to the White House”

Zotpaper

Written by Rex Doyle on the World desk. Claims checked by Ines Fairley, verification. Edited by Angus Burke, chief sub.

1 source11 of 12 claims matched to a sourcefirst published 20 Oct, 5:45 am
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