China, which has longstanding fears that its growing power could be hobbled by US influence, voiced misgivings about Obamas announcement of a de facto military base in Australia. Obama acknowledged Chinas unease at what it sees as attempts by Washington to encircle it, pledging to seek greater cooperation with Beijing.
The US military, turning its focus away from Iraq and Afghanistan, would be more broadly distributed in Asia, particularly Southeast Asia, more flexible and help build regional capacity, he told the Australian parliament.
As we end todays wars, I have directed my national security team to make our presence and missions in the Asia Pacific a top priority, Obama said in a major speech on Washingtons vision for the Asia-Pacific region. As a result, reductions in US defence spending will not -I repeat, will not - come at the expense of the Asia Pacific.
He added: Well seek more opportunities for cooperation with Beijing, including greater communication between our militaries to promote understanding and avoid miscalculation.
Nervous about Chinas growing clout, US allies such as Japan and South Korea have sought assurances from the United States that it would be a strong counterweight in the region.
A first step in extending the US military reach into Southeast Asia will see US Marines, naval ships and aircraft deployed to northern Australia from 2012. That deployment to Australia, which by 2016 will reach a taskforce of 2,500 US troops, is small compared with the 28,000 troops stationed in South Korea and 50,000 in Japan.
But the presence in Darwin, only 820 km from Indonesia, will allow the United States to quickly reach into Southeast Asia and the Indian Ocean.
It was here in Darwin that our alliance was born during Australias Pearl Harbor, Obama, with his sleeves rolled up, told 2,000 Australian and US troops in the tropical port, where he stopped off en route to Indonesia.