Army

Warrant Officer Class Two Lachlan Muddle, a highly qualified special forces sniper and military free-fall parachutist, has died after a mid-air collision with another paratrooper during an army training exercise.  

Vietnam veteran John O'Halloran is awarded Australia's third-highest military honour for leading a fixed bayonet charge on "one of Australia's worst days in South Vietnam".

A search and rescue operation is underway for the service members who went missing in mountainous terrain. 

Police were concerned war veteran Ben Roberts-Smith was attempting to move overseas and possibly to Singapore or Spain, court documents reveal.

Ben Roberts-Smith has been seen reporting to police for the first time since he was released on bail after being charged with the war crime of murder.

War veteran Ben Roberts-Smith issues his first statement since his release on bail from a Sydney jail. 

A legal expert says the criminal prosecution of former soldier Ben Roberts-Smith will test Australia's war crimes legal framework in ways never seen before, as the case moves toward a trial.

Vice Admiral Mark Hammond, who has spent 40 years in the navy, will replace current defence force chief David Johnston when he retires in July.

War veteran Ben Roberts-Smith will remain in custody after his lawyers made no application for bail in his first court hearing since his arrest.

During his years-long battle to clear his name, a separate joint investigation stretching 9,000 kilometres was discreetly transpiring.

One of Australia's most decorated soldiers, Ben Roberts-Smith, has been charged with five counts of the war crime of murder.

An Australian Army reservist faces an Adelaide court after he allegedly worked for the Ukraine military as a drone operator without authorisation.

Floodwaters may have receded around the Archer River but the clean-up is just beginning after Severe Tropical Cyclone Narelle tore through last week.

Rather than depicting the front line, the Australian War Memorial's new exhibition focuses on preparation for war, the people caught in between and the Australians assisting them.

Defence analysts have criticised planning around the Northern Territory's defence infrastructure, saying Australia risks becoming the secondary user of the NT's geographic advantages, behind the US military.

Cracks have appeared in a concrete dome holding 120,000 tonnes of contaminated soil and debris from Cold War-era nuclear bomb tests. 

The head of Papua New Guinea's military says the country does not have the capacity to safely store 3,500 rifles Australia plans to ship to the country, raising fears they could end up in the hands of tribal warlords.

Defence Minister Richard Marles says Australian personnel are safe and accounted for after an air base used by Australian forces was hit by Iranian drones near Dubai. 

Major General Chris Smith delivered an excoriating address to a major conference last year, declaring "managerial and advertising logic and double speak" had "polluted" the military.

The Department of Defence announces plans to sell off both Leeuwin and Irwin barracks, freeing up dozens of hectares of residential land in prime Perth suburbs.