Defence and National Security

A committee of Congress wants the US Navy to explain how building "Trump-class" battleships will not delay other nuclear-powered boats, such as submarines needed for AUKUS.

India's Great Nicobar Island is home to one of the world's last isolated tribes who are believed to have lived there for thousands of years, but a rising China is set to see it undergo a major transformation at the Indian government's insistence.

Foreign Minister Penny Wong has told a parliamentary hearing she believes the allegations of Australian activists, who say they were sexually assaulted while detained by Israeli forces.

The changes announced over the weekend will see Australia buy three second-hand submarines, rather than two second-hand and one new.

Scrutiny of AUKUS's delivery reveals two "optimal pathways" for Australia's submarines.

In what is being described as a significant leap forward in Australia's push to develop and manufacture its own missiles, newly released footage shows the first test-firing of a locally made solid rocket motor. 

Days after the federal government revealed changes to the AUKUS submarine deal, a Labor backbencher has now called for a rethink on the entire plan.

Australia and the United States' initial positions about delivering a new submarine under AUKUS differed, Senate estimates has revealed.

Defence Minister Richard Marles has defended a shake-up to AUKUS that would involve Australia buying three second-hand Virginia-class submarines from the United States.

The US, Australia and United Kingdom have unveiled a new "signature" project to develop cutting edge weapons systems and sensors for underwater drones as they try to reinvigorate the second pillar of the AUKUS agreement.

The US Defense Secretary addressed Asia's most important defence summit, but did not mention Taiwan as questions remain over a stalled weapons package.

The head of a major UK intelligence agency is warning that Moscow and other adversaries could use artificial intelligence and other emerging technology to conduct "hybrid warfare" against Western allies.

The majority of the final group of Australians living in a notorious Syrian camp for the families of killed and captured Islamic State militants are expected to arrive in Australia soon. Here's what we know about them.

A taskforce will see leaders get a better idea of threats to energy deliveries, while Australia and New Zealand provide expert analysis on future supply.

Two Russian jets have intercepted a Royal Air Force plane over the Black Sea, flying close enough to trigger its emergency systems.

A labour union has called for transparency after Port Kembla in NSW was identified as a preferred east coast location for a nuclear submarine base in newly released documents.

The question for the Gulf states is whether they are happy for Israel to be the dominant player in the Middle East.

Russia launches hundreds of drones at Ukraine in the third straight day of widespread attacks on targets across the country.

Volodymyr Zelenskyy accuses Russia of attempting to overload Ukraine's defences in an hours-long onslaught.

As a peace deal between the US and Iran remains elusive, low-wage seafarers are in limbo as they witness an unprecedented 21st-century battle.