First of all, much is at stake for Asean, when the two heavyweight players use the current dispute in the South China Sea to pre-position themselves. Since the end of World War II, the US military might and presence has never been challenged by any power. It has served the region well, providing a conducive environment for human and economic development. However, with China quickly rising as the world's No 2 economy, the US is looking for the most effective ways to respond to this new situation.
By the end of 2011, the US began to rebalance its presence, pushing for stronger economic and military ties with allies, friends and former foes in the Asia-Pacific. The outcomes have been mixed as Washington continues to jump from one international crisis to another.