"The US military today faces an emerging major operational challenge, particularly in the Western Pacific Theater of Operations (WPTO). The Chinese People's Liberation Army's (PLA) ongoing efforts to field robust anti-access/area-denial (A2/AD) capabilities are threatening to make US power projection increasingly risky and, in some cases and contexts, prohibitively costly. If this occurs, the United States will find itself effectively locked out of a region that has been declared a vital security interest by every administration in the last sixty years. It will also leave longstanding US allies and partners vulnerable to aggression or, more likely, subtle forms of coercion. Consequently, the United States confronts a strategic choice: either accept this ongoing negative shift in the military balance, or explore options for offsetting it. This paper does just that. It offers a point-of-departure concept designed to maintain a stable military balance in the WPTO, one that offsets the PLA's rapidly improving A2/AD capabilities. We have titled this concept 'AirSea Battle,' in recognition that this theater of operations is dominated by naval and air forces, and the domains of space and cyberspace."--P. [iv].