Several pronounced trends are emerging as the United States moves beyond its “unipolar moment,” the foremost among them being the rise of developing powers and the proliferation of asymmetric technologies. The Asia-Pacific, with a rising China at its center, is the critical arena in which Washington must respond to these challenges. China’s unyielding stance on its present territorial and maritime claims and continued development of anti-access/area denial (A2/AD) capabilities are particularly worrisome. While it is premature to project a global power transition in which China eclipses U.S. power and influence, the United States needs to remain closely aware of and engaged in regional affairs to retain an influential role and remain a reliable security partner throughout the Asia-Pacific. This brief offers a set of force structure priorities for the United States as it grapples with China’s increasingly sophisticated capabilities.