National security issues have been a constant feature of this federal election campaign.

Both major parties have spruiked their national security credentials by promising additional defence spending. The Coalition has pledged to spend 3% of Australia’s GDP on defence within a decade, while Labor is accelerating its own spending increase of $50 billion over the next decade.

Even the Greens have got in on the act, pledging to “decouple” Australia from the US military.

Against this backdrop, of course, is the omnipresent figure of US President Donald Trump, with questions about the reliability of the US as an ally and the impact his policy decisions will have on Australian security. The possible deployment of Russian aircraft to Indonesia and the Chinese warships sailing around Australia have made these issues even more salient.

But what do Australians actually know about defence issues, and what are they comfortable spending on it?

According to our major new survey of 1,500 Australian adults, only........

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