US bombers were given air access in the Top End as part of their mission to target Houthi forces in Yemen, the Department of Defence has confirmed.

It remains unclear what damage or how many casualties were inflicted.

However, it was revealed the Australian Government had a role in the mission, with the Department of Defence confirming contribution.

“Australia provided support for US strikes conducted on 17 October 2024 targeting Houthi facilities in Yemen, through access and overflight for US aircraft in northern Australia,” a Defence spokesperson said.

Defence maintains the bombers did not operate from any Royal Australian Air Force base, contrary to speculation online which reported RAAF Base Tindal, in Katherine, to have launched the airframes.

The Department of Defence has confirmed Australia provided support for the US strikes on underground bunkers used by Yemen's Houthi rebels "through access and overflight for USA aircraft in northern Australia".

The US said its strikes were ordered by President Joe Biden to degrade the Houthi weapons stores and send a message to "our adversaries", which includes Iran.

An Australian official said the support was "consistent with our long-standing alliance commitment and close cooperation, demonstrating the interoperability of our militaries".

"It is a clear demonstration that the US Air Force can operate B-2s from forward Australian bases to deliver precision strikes at a range that could also encompass targets in China.

Deep in the outback, a flurry of construction by Australia and the United States is transforming this once quiet military installation into a potential launchpad in case of conflict with China.

Runways are being expanded and strengthened to accommodate the allies’ biggest airplanes, including American B-52 bombers. A pair of massive fuel depots is rising side by side to supply U.S. and Australian fighter jets. And two earth-covered bunkers have been built for U.S. munitions.

But the activity at RAAF Tindal, less than 2,000 miles from the emerging flash points of the South China Sea, isn’t unique. Across Australia, decades-old facilities — many built by the United States during World War II — are now being dusted off or upgraded amid growing fears of another global conflict.

Marles declined to comment on the increasing rotations ... but said the trajectory is “an increasing American force posture in Australia.”

The federal funding boost will upgrade bases in the Northern Territory, Western Australia and North Queensland during the coming decade, as part of Defence's pivot towards the Indo-Pacific.

Darwin's Larrakeyah Defence Precinct will be upgraded to berth submarines, but Mr Conroy said Australia's future nuclear submarine fleet would not be based in the Top End.

He said the government was focused on "hardening and developing" bases in the Northern Territory, as well as other installations in northern Western Australia and North Queensland.

"The NT is critical to the defence of the nation, not just in defending Australia but projecting power out into our region against any potential adversary," Mr Conroy said. He said the funding would go towards projects such as surveillance aircraft based at RAAF Tindal, near Katherine, and the purchasing and training of crew for new amphibious landing craft based in Darwin.

The national significance of key Northern Territory infrastructure assets has been singled-out in a crucial new defence review released on Monday.

The Defence Strategic Review found recent severe flooding which closed the Stuart Highway and Alice Springs to Darwin railway this year had “highlighted the importance” of well-maintained resilient civil infrastructure, including ports and roads that support the network.

The future role of Robertson Barracks, home to the 1st Brigade, in our ongoing defence is unclear, but could potentially be beefed up.

The report forecasts “significant changes to army force posture and structure”, saying army combat brigades “may be re-roled and select capabilities postured in Northern Australia”.

One of six key recommendations is to improve the Australian Defence Force’s capacity to operate from Australia’s northern bases.