ADF chief warns Australia must be ready to launch combat operations from home

Australia Broadcast Center

04-06-2025

Australia's Chief of the Defence Force, Admiral David Johnston, says the nation must be prepared for the possibility of having to launch combat operations from its own soil — a significant shift in military thinking not seen since World War II.
Speaking at the Australian Strategic Policy Institute's Defence Conference in Canberra on Wednesday, Admiral Johnston said Australia needed to "reconsider" how it thought about war, resilience and national preparedness.
"Perhaps finally we are having to reconsider Australia as a homeland from which we will conduct combat operations," he said.
"That is a very different way — almost since the Second World War of how we think of national resilience and preparedness.
"We might need to operate and conduct operations from this country — everything from our northern infrastructure, our supply chains …"
Admiral Johnston also pointed to the rapid evolution of modern warfare, highlighting that military technology could become obsolete in as little as 12 weeks, as seen in the Ukraine conflict.
"The cycle is somewhere about 12 weeks before tech investments become irrelevant because of counter strategies," he said. "We need to be very clear about where we make investments in our technical capability."
His remarks come amid growing international pressure for allies to lift their defence budgets, with US Defense Secretary Pete Hegseth urging Australia over the weekend to boost spending to 3.5 per cent of GDP.
Asked about the national conversation around funding, Admiral Johnston laughed but acknowledged the strain on resources and defended the current approach shaped by Labor's recent strategic review of defence.
"The Australian community wants education, a health system to look after the elderly, so making sure we do the best we can to present the issues of national security issues in our country, and we do that unambiguously and without avoiding some of those key areas of risk.
"Frank advice is key but knowing that's not the only issue the government contends with and working with our partners — where are our common interests — where our interests intersect so we can push outcomes that meet multiple objectives."
Pressed specifically on Mr Hegseth's request and the Coalition's calls for higher spending, he said it was an important debate and acknowledged the associated challenges.
"Defence is fully expending its budget at the moment," he said.
"That's a good thing as we've uplifted our acquisition delivery, [our] workforce is improving … It does put pressure on the budget we need to make choices on."
He said it was "helpful" that the government had moved to a biannual strategic review cycle, noting that it allowed Defence to continually update its case about where resources were most needed.
"It's unlike in the past … where the frequency or structure of reviews was an open-ended proposition," Admiral Johnston said.
"We keep coming back, reviewing the strategy and looking at the opportunities or where the investments are required."
Admiral Johnston said he would continue to give frank advice to the government to inform its spending decisions and flagged that Defence was working on a fresh strategy to be released next year.
Prime Minister Anthony Albanese is expected to attend the G7 summit in Canada in a couple of weeks, where defence spending will likely feature in a potential sideline discussion between Mr Albanese and US President Donald Trump. That meeting is not yet locked in.