Vice Admiral Scott Swift, commander of the Japan-based US 7th Fleet and in Sydney for bilateral exercises, said maritime security was an increasingly important issue in the Indo-Pacific region as both trade and militarisation boomed.
"Economic power is being converted to military power in many parts of the region, which may increase the temptation to use coercion or force in an attempt to resolve differences between nations," he said in a speech to the Lowy Institute foreign policy think-tank.
Swift said he was "very encouraged by the pace" of military connections in the region amid escalating tensions over issues including the South China Sea.
China claims nearly all of the sea, rejecting competing claims to parts of it by the Philippines, Vietnam, Brunei, Malaysia and Taiwan.
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Some of the claimants have expressed concern at Beijing's increasingly assertive military and diplomatic tactics to stress its control.
Swift said his focus was on inclusive military operations, seeking "to the maximum extent possible multilateral exercises", adding he had had "very collegial exchanges with PLAN (Chinese navy) ships throughout the region, and really throughout the world".
"We need to be methodical and thoughtful about the process by which we pull the relationships together," he said.
"In the past I think there's been a rush to achieve a form of success without fully understanding what success is, especially in the context of the parties that are coming together."
But he distanced himself from comparisons with the 40-year US-Soviet standoff, saying there were "very, very different circumstances", starting with the fact that the 7th Fleet was as large as the entire Chinese navy.
"We have much more in common than we do have in competition with China," Swift added.
"The Cold War was really a competition between governments, competition between our militaries, who was the strongest was the question of the day. I just don't see that in today's maritime environment."