The announcement came withthelaunch of2016 Defence whitepaper that includes bolstering thecountry's naval strength by doubling its submarine fleet to 24, as well as commissioning three additional air warfare destroyers, nine anti-submarine frigates and 12 patrol boats.
The ambitious plan also includes adding some 2,500 new military jobs to expand the total defence force to 62,400 personnel.
The prime minister called the present times in Asia one of the biggest strategic challenge Australia has faced "in peacetime", even as its closest ally, the US directs its foreign policy pivot towards the Asia-Pacific region, where China's increased assertiveness has fueled tensions.
In the next two decades, said Turnbull, "half the world's submarines and half the world's combat aircraft" would be deployed in the Indo-Pacific region.
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According to anofficial statement, theWhite Paper has beenthe culmination of detailed analysis of Australia's strategic environment, its defence priorities and objectives, and the capabilities required to achieve these outcomes.
ThefederalGovernment hasalso set a new benchmark for transparency and funding by releasing an Integrated Investment Program and Defence Industry Policy Statement.
The fully costed, ten-year Integrated Investment Program wouldbringtogether all capability-related investment including new weapons, platforms, infrastructure and science and technology.
Australia is also participating in the US-led air campaign against the Islamic State terror group in Iraq and Syria.