Journal of
Military andStrategic
VOLUME 15, ISSUE 3, 2014

Studies

The Limits and Implications of the Air-Sea Battle Concept:
A Japanese Perspective

Masahiro Matsumura1

Introduction
The world has seen the international distribution of power gradually shifting,driven in great part by China’s rise and America‘s relative decline. Almost continuously
for two decades, China has kept double-digit growth rates in defense spending and,
consequently, made military build-ups that are unprecedented in modern international
history. China has also demonstrated a series of increasingly assertive diplomatic andmilitary actions as related to its irredentist claims to Taiwan, the Senkaku Islands, theSpratly Islands, and the Paracel Islands, among others. Although the regional security
order of the East Asia and the Western Pacific appears sufficiently stable, the US and its
major regional allies together have to deter and, if necessary, defeat possible China’s
armed aggression against the territorial status quo. Doing so is a challenge even for thehegemonic US, on the grounds that the aftermath of the 2008 Lehman Shock has

Masahiro Matsumura is Professor of International Politics at St. Andrew’s University (Momoyama
Gakuin Daigaku) in Osaka. An early draft of this paper was presented at the 6 th Defense Forum on
Regional Security held in Taipei, Republic of China (Taiwan), sponsored by the ROC Ministry of
National Defense, on July 24, 2012. This work is also a result of the University’s Research InstituteCollaborative Project “Japan’s Security in the 21st Century (IV).” The author would like to express great
appreciation to three anonymous reviewers who offered helpful comments and candid critiques.
1©Centre of Military and Strategic Studies, 2014
ISSN : 1488-559X

JOURNAL OF MILITARY AND STRATEGIC STUDIES

seriously impaired the health of the US political economy, and that its defense spendingis anticipated to undergo one major cut after another, at least, for a decade to come.2
For this purpose, the US has developed a new operational concept, known as‘Air-Sea Battle’ (ASB), to offset the negative impact of its relative decline on militarycapability and to maintain effective deterrence and, if necessary, sufficient battlewinning capability vis-à-vis China.3 As of today, the most in-depth and authoritative
analysis on the concept is perhaps AirSea Battle: A Point-of-Departure Operational Concept
by Jan van Tol1, et.al.4 while a major official report is “AirSea Battle: Service
Collaboration to Address Anti-Access & Area Denial Challenge” by the US Departmentof Defense AirSea Battle Office in May 2013.5
Even with less defense spending in acquisition and procurement, the ASB isdesigned to enable such offsetting by jointly employing air and naval capabilities forcross-service and cross-domain synergy. Thus, the concept aims to counterbalance
China’s quantitative advantage in its periphery with US qualitative advantage. Yet, howmuch counterbalancing effect can be achieved remains to be seen, at least until concrete
operational plans based on specific operational doctrines are developed. Certainly, therudimentary idea thereof was already discussed in the process of the 2010 Quadrennial
Defense Review, but the Pentagon’s joint ASB office was set up with a small number ofmilitary staffs, only in summer 2011. No major development at conceptual andoperational levels has been seen since, at least in the public domain, given that the ASB
is an evolving and classified concept.

See, Department of Defense, The Quadrennial Defense Review of 2014.
http://www.csbaonline.org/publications/2010/05/airsea-battle-concept/, accessed on May 7, 2013. It saysthat the ASB helps “to set the conditions at the operational level to sustain a stable, favorable
conventional military balance throughout the Western Pacific region (p.xi).” It does not aim “a rollback of
the PLA’s military power” nor “containment of China”, but advocates “offsetting the PLA’s unprovoked
and unwarranted military buildup” (p.x). The ASB emulates after the “Air-Land Battle” concept that was
designed to outdo the quantitative advantage of Soviet military power in the continental European
theatre (pp. 7-8).
4 Jan van Tol, et. al. AirSea Battle: A Point-of-Departure Operational Concept (Washington, D.C.: Center for
Strategic and Budgetary Assessment, 2010).
5 http://www.defense.gov/pubs/asb-ConceptImplementation-Summary-May-2013.pdf,
accessed on May 7, 2013.
2
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Consequently, the ASB is in its infancy, involving significant strategic
implications and policy utilities. The concept is instrumental in sending strong
messages to US allies, assuring them of Washington’s defense commitment on the basisof the expected significant enhancement in power projection capability, even if it now
exists merely on paper. Such messages are essential to maintain the integrity of the huband-spokes system of bilateral alliances between the US and major regional allies. Also,a highly cost-effective approach to joint operation combining air and naval capabilities
as well as new guidelines for armaments and force structure, entailing budgeting arms
acquisition/procurement and military technology development, can be derived from theconcept. Without the guidelines, the services would compete for shrinking resources,
optimizing their own organizational interests. They would even make redundantinvestments in weapon systems that could later be found non-interoperable between
the services and, perhaps, even within a service. The Pentagon requires the guidelines
to prove to the purse-controlling Congress that ASB capability is attainable even under
the growing fiscal constraints, thereby avoiding large defense budget cuts as a central
part of the anticipated fiscal austerity.
These two utilities of ASB, however, rest essentially on the assumption that its
rudimental doctrinal reasoning is relevant for and consistent with US strategies atstrategic levels. Apparently, however, the concept still stands alone at the tactical andoperational levels without being sufficiently connected to the strategies. This means thatthe discussion on the concept has so far failed to explore its implications for US national
interests, goals, and priorities at the geo-strategic and geo-economic levels and to thehigher security objectives derived from them. Thus, the concept in itself is not
instrumental in determining under what condition the US has to begin and end a war
with China and for what purpose, although it may be developed into operational plansdesigned to win certain battles against China. But, these plans may not hold if China’s
military capability grows significantly faster and/or more than expected or, simply, if
China’s war plan renders them irrelevant for a victory, defined as the accomplishmentof a predetermined political objective which does not require China to win battles.
This paper will identify some major assumptions implicit in ASB as a US
response to China’s military rise, with a focus on the disjunction between the strategicand operational levels of thinking. Then the study will aim to comprehend some

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notable limits and pitfalls of ASB and prescribe necessary remedies. To do that, thestudy will explore the rationale why China has significantly strengthened its so-called
Anti-Access/Area-Denial (or, A2/AD) capability in the context of its overall strategy,
and focus on how well the ASB would counter China’s A2/AD. Contrarily, the study
may identify conditions under which ASB-based operational plans would fail to deter
China’s aggression or destabilize regional security. The study will be concluded with apolicy proposal for the US, Japan and Taiwan, according to optimistic, realistic andpessimistic scenarios. The paper will offer a conceptual and theoretical analysis, while
relying on some preceding works based on parametric approaches to Taiwan
contingency scenarios. It focuses more on air control and less on sea control, given thatthe former is prerequisite to the latter in a Taiwan contingency, and thus does notdiscuss some of supplementary yet important maritime strategic aspects. 6 The focus
does not necessarily deny that joint forces, including sailors, marines, or soldiers all
have roles to play.
To note, due to its own constitutional constraints, Japan remains incapable offormulating its defense strategy and policy for ASB-based combined offensive
operations with the US in a Taiwan contingency, except in rear-area/logistical supportand intelligence sharing even though the islands is indispensable to maintaining Japan’s
crucial south-bound sea lanes of communication. Article 9 of the pacifist constitution,
which the US imposed on an occupied Japan after W.W.II, not only requires the country
to follow exclusively defensive policy solely aimed to repulse an aggressor but also
prohibits the country from exercising the right of collective self-defense.7 This means
that, for example, the country cannot employ its 6 AEGIS destroyers and other counterA2/AD capabilities unless it is under attack and that it cannot fight hand in hand with
US forces outside its own territory, including territorial sea and airspace. Certainly,
some of these vessels can be deployed in the vicinity of Okinawa exclusively for the
These official documents include, inter alia, Department of Navy, Marine Corps, and Coast Guard, A
Cooperative Strategy of 21st Century Seapower, October 2007, and, Department of Navy, Naval Operations
Concept 2010, 2010.
7 The Abe Administration now plans to change, in summer 2014, the established interpretation of Article
9 in a way to authorize exercising the right of collective self-defense under limited conditions, which it
believes it essential to formulate new Guidelines for Bilateral Defense Cooperation. Also, theadministration is putting constitutional amendment on national agenda. Yet, should he be successful inthis effort, combined offensive operation with the U.S., particularly in a Taiwan contingency, will be
extremely difficult. See, Yomiuri Shimbun, February 22, 2014; and Sankei Shimbun February 22, 2014.
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defense of Okinawa, which includes the major US bases, but, as analysed later, China
can easily saturate Japanese missile defense capability. The Japan-US mutual security
treaty stipulates that Japan provide necessary military bases and facilities on its soil for
US forces and that the US defend Japan. This means that Japan is not obligated todefend the US forces outside its territory. Consequently, as of today, there is little
discussion in Japan, at least in the public domain, of the implications of US ASB-based
operation to Japan’s defense planning.
Nonetheless, Japan may likely be trapped in a Taiwan contingency, on the
grounds that China may attack the strategically pivotal Okinawa, particularly the US
Air Base in Kadena, as a primary A2/AD stronghold in the theatre; the airpower thereof
is essential to carry out anti-access function, while the capacity is indispensable toreceiving reinforcements and logistical/rear-area support necessary for area-denial
function. The dual functions are practically inseparable in this particular theatre. Hence,
Japan has to grasp the limits and implications of ASB and, if possible, to coordinate its
defense policy with a US ASB-based war plan against China in the defense of Taiwan,even if it cannot cooperate or collaborate with US forces.
Analytically, this paper does not necessarily assume that both the US and China
practice a systematic and sequential formulation of grand strategy (or a comprehensive
strategy based on the articulation of national interests), defense strategy (or principlesof military activities and armament at politico-military levels), military strategy (orprinciples of military activities and armament at the operational levels), and operational
doctrine (or principles of operating armed forces on battlefield). Such a formulation is
ideal, which involves good analytical utility. However, China’s A2/AD is primarily
being formulated at the levels of defense and military strategies, and the ASB at thelevel of operational doctrine, both of which are not linked closely with the higher levels.
Thus, the paper will analyse a disjunction between the two and the higher strategies,
and explore if they can be articulated in a coherent manner.

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Chinese Strategy and A2/AD
Grand and Defense Strategies
The world is now watchful to see if what China calls its own “peaceful rise” isheading toward predatory regional hegemony. Since Deng Xiaoping started the open
policy in the late 1970s, China has followed a grand strategy designed to enhance its
relative power through economic growth and development, thereby shrinking the gap
with US hegemonic power. China is a beneficiary of interdependence and cooperationthat are consequent upon the highly stable international status quo under the U.S.
hegemony. In fact, China appears to have long acquiesced to the status quo because it isessential for the country’s rise. Despite having made great strides, however, China stilllacks the military power sufficient to challenge the US and an adequate economic baseto sustain a massive arms race to do so. But this state of affairs does not guarantee peacein the long run, because, after the catch-up phase, China could convert economic andtechnological power into military capabilities, thereby challenging the status quo.
Naturally, the US and Japan would be very concerned if China wants to reemerge as aregional hegemon and to eventually ease the US out of the region. Also, Japan worries if
it will be able to continue its reliance on the US as security guarantor within theframework of bilateral alliance or if it will have to be strategically independent tosafeguard its national security. If China is indeed a hegemonic aspirant, it will
eventually confront the US hegemon and the US-Japan alliance.
However, now that time appears to be on its side, China does not have tochallenge US hegemony at all, except when its core interests are in jeopardy. Even
without resorting to a hegemonic war with the US, China could pull neighboring
countries onto its orbit, as its geo-economic and geo-strategic weight is growing slowly
but steadily. A dominant China would be able to exert decisive influence over thepolicies of these countries not to challenge it while they maintain their respective
national sovereignty, as occurred, most typically to Finland vis-à-vis the Soviet Union
during the Cold War.
Thus, it is essential to understand China’s defense strategy as well as its militarycapabilities since a major war with the country is still possible, if not probable. The

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features of the current defense strategy will be clear when contrasted to the preceding
ones, with a focus on how it has evolved out.8
With the legacy of the anti-Japanese War and the subsequent Civil War, China
followed the so-called “People War” strategy for continental defense against a large
scale invasion. It aimed to win a total and protracted war by maintaining support of the
population and by drawing the enemy deep into the interior where the population
would exhaust them through a mix of mobile and guerrilla warfare.9
Having faced growing Soviet military power and its own defeat in the SinoVietnamese War of 1979, however, China replaced the first strategy with a strategy of‘People’s War under Modern Conditions.’ It assumed that a total war with the Soviet
Union or with the US was unlikely and aimed to win a local/limited war with modern
Soviet armed forces. China needed to defend its borders and major urban centers innorthern China from a limited Soviet invasion. China could no longer rely on the firststrategy because the Soviet forces could not be dragged deep into the Chinese interior.
The shift in strategy relied on technology as opposed to troops and involved troop cutsand professionalization. As well, the shift antiquated the low-tech guerrilla warfare andmass infantry tactics of the People’s Liberation Army (PLA), and instead required
mastery over mobility, rapid operations, and modern precision weaponry, which may
evolve into maritime force projection capability. The shift was made possible by Deng’s
political-economic reforms based on ‘socialism with Chinese characteristics’ and theopen policy that entailed military and technological investment.
After the first Gulf War in 1991, China turned to the third strategy of ‘Local War
under High-technology Conditions.’ It assumes that local wars are limited in
geographic scope, duration, and political objective, and dominated by high-technology
weaponry. The wars are conducted to achieve limited political objectives throughrelatively limited use of force, while military information systems have become
increasingly integrated across command, control, computers, communications,

Roger Cliff, Mark Burkles, Michael S. Chase, Derek Eaton, and Kevin L. Pollpeter, Entering the Dragon’s
Lair: Chinese Strategies and Their Implications for the United States (Santa Monica: RAND, 2007), pp.18-23.
9 Tse-tung Mao, On Protracted War (University Press of the Pacific, 2001).
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intelligence, surveillance, and reconnaissance (C4ISR). Since 2004, China has preparedfor “Informationized Local War.”10
China will certainly apply the third defense strategy to a possible Sino-US
military conflict. The following analysis will discuss which core interest of China, as a
primary cause of the conflict, will be most likely challenged and how.

The Taiwan Issue as a Primary Core Interest
Today, China holds a grudge against “the century of humiliation” in the age ofWestern imperialism and colonialism that, according to its own perspective, began fromthe mid-19th century. It seeks to maintain its territorial integrity which, in and of itself, istotally consistent with international law in general and the Charter of the United
Nations in particular. Yet, China’s irredentist claims to some areas on its periphery,
including Taiwan, the Senkaku Islands, the Spratly Islands, the Paracel Islands, among
others, might lead to its military aggression, challenging the status quo or precluding apeaceful territorial change even if necessary. In particular, China enacted the AntiSecession Law of 2005 that justifies armed attack against Taiwan and even forced
unification thereof should Taiwan declare de jure independence or should it indefinitelydefer unification. In the case of an unprovoked attack by China against Taiwan, US
military intervention would be likely since the country is committed to serving as thesole guarantor of Taiwan’s security and de facto independence, albeit expressedindirectly by the Taiwan Relations Act. Should Taiwan declare de jure independence,such intervention would be uncertain.
Preparing a Sino-US armed conflict, even if a chance appears slim at this point, 11
is necessary given that China firmly regards the Taiwan issue as a primary core interestand that China increasingly sees the legitimacy of its communist regime dependent
more and more on the popular sense of nationalism centred on the issue. This is

Roger Cliff, “Anti-Access Measures in Chinese Defense Strategy,” a testimony presented before the
U.S.-China Economic and Security Review Commission on January 27, 2011,
http://www.rand.org/pubs/testimonies/CT354.html, accessed on June 30, 2012.
11 The prospect will drastically change if Taiwan’s domestic politics evolves out toward proindependence or even toward the complete rejection of unification.
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inevitable because the communist ideology is already defunct and because, as thealternative base of legitimation, high economic growth rates will no longer besustainable as in the past. The unification of Taiwan remains the major unfulfilled
China’s ‘core interests,’ while the other two, Tibet and Xinjiang, only have to retained.
Certainly, China has a huge landmass and a long border to defend so that its militaryforce structure has not been entirely designed to cope with a Taiwan contingency, but
the country has made a large concentration of A2/AD-capable armed forces in thetheatre by choice, not by need. These alone will justify a Taiwan contingency as thefocus of this paper.
Thus, China’s war objective would lie in preventing Taiwan independence atleast and unifying Taiwan at most. A war is a mere continuation of politics by othermeans, and, therefore, winning one is defined as achieving a predetermined politicalobjective.
This means that, as long as it attains such an objective, China can enjoy anultimate political victory, even if it fails to achieve a limited military victory against the
US on battlefield. At minimum, the Chinese communist regime just has to be able tofight to a standstill and pursue a political settlement through negotiation, after
achieving a set of limited objectives that the Chinese public could accept as a victory.
Furthermore, even if such a settlement should not be accomplished, China could be
victorious by successfully forcing the US to shoulder economic burden of war that willlead to debilitation of the US hegemony, and by compelling the US to give up theguarantor role of Taiwan’s security. (Certainly, China has to accept the risk of failing toachieve its immediate or mid-term objectives, involving

negative economic

consequences of starting a war, calling the legitimacy of the regime into question. Yet,
China may dare to run the risk out of miscalculation or adventurism driven by domestic
politics.) Similarly, the objective would be satisfied by raising potential costs of U.S.
intervention that will decisively weaken the resolve of the U.S. public and leadership tointervene; or by winning a quick war solely against Taiwan that will deprive the U.S. ofan opportunity to intervene with acceptable costs.

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Military Strategy: A2/AD
To achieve limited objectives, China can maximize its relative strength andexploit US weaknesses, politically, diplomatically, and/or militarily. China neither has
to achieve global military primacy nor possess military capability symmetric force-toforce with the US counterpart. China just has to attain local superiority in theimmediate neighboring areas around Taiwan by denying US forces to enter into thetheatre and by limiting maneuverability within it, namely, Anti-Access/Area-Denial(A2/AD).12 Once such superiority is established, the US has to withdraw its forces tomore distant locations from China, including naval surface ships operating in waters
near China.
Certainly, China will enjoy local superiority if the US does not have enoughforces available in the East Asia or if the US were engaged in two wars simultaneously
in the Middle East and in East Asia. Similarly, China could attain local superiority bypressing potentially unreliable US allies to either limit or deny US access to forward
bases in the theatre. In this light, Japan is China’s primary diplomatic and politicaltarget, particularly because US bases in Okinawa will surely play a critical role when
the country takes military action against China.
China currently has military weaknesses and shortcomings vis-à-vis thetechnologically superior US, across the board from weapon systems to organizational
capability to human resources. Only by employing A2/AD measures, including groundbased, sea-based and airborne ballistic and cruise missiles in combination with cyber,anti-satellite, and electric/electro-magnetic warfare, could China be a US near-peer
competitor in the theatre centered on Taiwan.
To achieve a limited military victory, China can take full advantage of specificgeographical and political contexts. The country has to avoid direct force-on-force
confrontation with the technologically superior US. Instead, China would have to seize
the initiative early at the operational level, avoiding the risks of passively waiting for
The US Department of Defense (DoD) defines Anti-Access as “those actions and capabilities, usually
long-range, designed to prevent an opposing force from entering an operational area”, and Area-Denial
as “those actions and capabilities, usually shorter range, designed not to keep an opposing force out, but
to limit its freedom of action within the operational area.” See, the Department of Defense, Joint
Operational Access Concept, January12, 2012, p. i.
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the US to completely deploy. Also, China would have to use the element of surprising
the US by striking at an unexpected time and in an unanticipated place, entailing
focused preemptive attacks against vulnerable key-point military targets, includingcommand systems, weapon systems, logistic systems, air bases, ports, and sea lanes ofcommunication, and aircraft carriers.13 Furthermore, China would have to strike US
integrated information systems that are central to collecting, processing, andtransmitting electronic data, such as C4ISR systems, computer networks and satellites,
given that they are essential for successful execution of high-tech weaponry. With allthese measures combined, China could crush US will to resist.
This strategy is very remincient of Soviet thinking during the Cold War. It aims
to purse an asymmetrical capability based on mobile precision-guided, land-based
ballistic missiles, which is far cheaper than building a 21st-century version of theImperial Japanese Navy. In fact, China watched the development of these missiles,
including US Pershing II missiles and Maneuvering Reentry Vehicles (MaRVs).
Erickson and Yang found that, even in 1972, China considered using land-based
ballistic missiles to hit targets at sea,14 and that China incorporated A2/AD thinking andmeasures very well into its military publications on operational doctrines.15
In 2007, Roger Cliff and others noted that anti-access themes were pronounced in
Chinese strategies as options available in an armed conflict with the US, although
Chinese military publications did not use a term equivalent to anti-access.16
To bring the A2/AD thinking into reality, it is essential to construct operational
doctrines and to develop, acquire and deploy A2/AD weapons and measures. By
examining the variety, quantity, and quality of China’s current armaments, it will bepossible to grasp its A2/AD capability as embodiment of the thinking.

Cliff, et.al, Entering the Dragon’s Lair, pp. 89-93.
Andrew S. Erickson and David D. Yang, “Using the Land to Control the Sea: Chinese Analysts consider
the Antiship Ballistic Missile”, Naval War College Review, Vol. 62, No. 4, 2009, p. 55.
15 Thomas G. Mahnken, “China’s Anti-Access Strategy in Historical and Theoretical Perspective,” Journalof Strategic Studies 34, no. 3 (2011): pp. 17-320.
16 Cliff, et.al, Entering the Dragon’s Lair, p. 17.
13
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A2/AD Measures and Offensive Capability
For a more than decade, the US Department of Defense (DoD) has consistently
warned of China’s large and yet growing capabilities in advanced cruise missiles, shortand medium range conventional ballistic missiles, counter-space weapons, and military
cyberspace, all of which have considerably enhanced China’s A2/AD capabilities. The
DoD also argues that China has continuously improved its capabilities in advanced
fighter aircraft, limited power projection, integrated air defenses, undersea warfare,nuclear deterrence and strategic strike, improved command and control, and moresophisticated training for air, naval, and land forces,17 as evidenced by the recent
inaugural flight testing of the J-20 stealth fighter and with the launch of the first aircraft
carrier for sea trials.18
China has built a substantial arsenal of conventional ballistic missiles. In 2009,
the DoD estimated that China then possessed 1150 short range ballistic missiles(SRBMs),19 80 medium range ballistic missiles (MRBMs), and 40 intermediate range
ballistic missiles (IRBMs), while their qualitative improvement was steadily underway.
Also, the number of SRBM launchers reached to 250, MRBM to 90, IRBM to 55.20 Thismeans China has a large number of conventional ballistic missiles with which to strike
key military targets like forces, bases and facilities, not only in Taiwan but also in
Okinawa from which the US would project air power in case of a Taiwan contingency.
Also, it is well known that many of the missiles are loaded on highly mobiletransporter-elector-launchers (TELs), rendering them far less susceptible to missile
attacks and, therefore, highly survivable.
Revealingly, Shlapak estimated that 150 to 250 SRBMs could cut every runaway
at Taiwan’s fighter bases and destroy almost all the aircraft parked in the open without

US Department of Defense, Annual Report to Congress: Military Power of the People’s Republic of China, or,Annual Report to Congress: Military and Security Developments Involving the People’s Republic of China,
various years. SRBMs have a range of less than 1,000km, MRBMs 1,000 km to 3,000 km, IRMBs 3,000 km
to 5,500 km.
18 Annual Report to Congress, 2012, p. ii.
19 Annual Report to Congress, 2010.
20 Annual Report to Congress, 2009; Ibid.; van Tol, Jan, p. 37.
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being protected by a hardened shelter.21 He also projected that 60 to 200 submunitionequipped SRBMs aimed at operating surfaces would temporarily close most of
Taiwan’s fighter bases.22 Similarly, Gons has found that, based on the expected footprintof a submunition-armed DF-15,23 only 34 of DF-15 are necessary to severely damage ordestroy every aircraft parked in the open at the Kadena Air Base (AB) in Okinawa,
which has only 15 hardened shelters.24 If preemptively attacked, the US Air Force(USAF) will not have a chance to destroy most of TELs deployed on mainland China.
The limited missile defense as currently deployed would be easily saturated by salvoesof Chinese missiles.
In addition, in 2008, Shlapak assumed that China possessed an unlimited
number of precision-guided munitions (PGMs) and 200 cruise missiles that werecapable of reaching both Taiwan and Okinawa.25 In particular, DH-10, which is China’s
primary land-based land-attack cruise missile (LACM) using terrain contour matchingguidance comparable to the US Tomahawk missile, is capable of striking hardened
aircraft shelters in the Kadena AB. Shlapak simulated that 20 to 90 percent of all
friendly aircraft would be destroyed on the ground in the open.26
As Shlapak points out, China’s missile forces is approaching a “knock-outpunch” on Taiwan’s air bases, and will enable China to gain control of the airspace atleast in the first hours of conflict.27 Accordingly, the operational logic of A2/AD involves
a strong impulse to preemptively attack the US forces in Japan, particularly the Kadena
AB in Okinawa, which could serve as a primary stronghold to defend Taiwan as well asJapan.

David A., Shlapak, et.al, A Question of Balance: Political Context and Military Aspects of the China-Taiwan
Dispute (Santa Monica, RAND, 2009), p. 78.
22 Ibid., p. 51.
23 Stephen Gons, “Access Challenges and Implications for Airpower in the Western Pacific,” (PhD diss.,Pardee RAND Graduate School, 2010), p. 64.
24 Ibid, p. 70.
25 Shlapak, p. 55; The DoD estimated that between 50 and 250 DH-10 were already deployed. See, Annual
Report to Congress, 2008, p. 56.
26 Shlapak, p. 74.
27 Ibid, p. 64.
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Equally important is China’s rapidly growing air power due to a significant
modernization of fighters supported by a small number of poorly performing airborne
early warning and control (AEW&C) aircraft and the modestly modernized integrated
air defense. It is well known that the number of PLA Air Force’s (PLAAF’s) fourth
generation fighters have more than quadrupled over a decade, while that of the secondgeneration fighters has reduced by two-thirds. The DoD estimated in 2011 that the
PLAAF already deployed 490 aircraft, including 330 fighters near Taiwan, which could
conduct combat operation against the island without refueling.28 These include
advanced 4th-generation fighters―Russian Su-27 Flanker and domestically produced J10―armed with PGMs, stand-off air-to-air missile PL-12s, and LACMs. Chinesemanned aircraft would be able to deliver them against the opponents’ hardened key
military targets, most effectively, once air superiority is attained by suppressing Blue airbases/facilities and aircraft with ballistic and cruise missiles.
Ambitiously enough, China is also trying to transform a brown-water navy29 to ablue-water navy including aircraft carriers. But, due to its fiscal constraints, China
cannot easily possess and sustain three or more full-fledged carrier battle groups in thenear future. Nor can it readily develop and manufacture advanced aircraft to be put onboard that do not need long runways for take-off and that can withstand the stress of
landing on a carrier. It will take a long time until it masters how to operate a carrier
strike force. To supplement these limits, China is rapidly building effective A2/AD
measures against US carrier battle groups, such as missiles, modern torpedoes, andmines. In particular, the inventory of mines now exceeds 50,000.30 Thus it seems that thedevelopment of a blue water fleet and careers does not fit well with China’s overall
military strategy of A2/AD, which would proceed more fully and rapidly, if without
diverting resources to the development. Whether China simply considers thedevelopment as a long-term objective or whether it purses a seemingly irrational policy
due to some domestic political reasons is beyond the scope of this paper.

Annual Report to Congress, 2011, p. 76.
China certainly has a Xia Class ballistic missile nuclear-powered submarine (SSBN) that has apparently
never been on an operational deterrence patrol, as well as five poorly-performing Han Class nuclearpowered attack submarines (SSNs). For some details, please look at <http://www.globalsecurity.org>.
30 Annual Report to Congress, 2012, p. 23.
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With its A2/AD capability significantly enhanced, China will certainly be more
confident of seizing the initiative early in rapid-pace, short-duration operation, whiledeveloping a war plan based on a quick victory in an invasion of Taiwan. Since thepublic averts high casualties, the US will increasingly face a challenge to directly
defending Taiwan. Then, it is crucial to examine if the proposed ASB is effective tocounter China’s A2/AD both in the strategic and operational contexts.

US Strategy and ASB
US Relative Decline and Strategic Options
With the Cold War over, the US has four options of grand strategy: hegemony,selective engagement, off-shore balancing, and isolationism. Yet, these can be reduced
to two for the sake of discussion: hegemony and off-shore balancing.
According to Layne, “hegemony seeks to maintain an imbalance of power inEurasia in America’s favor. Selective engagement ostensibly seeks to maintain amultipolar distribution of power.” Despite their conceptual distinction, both neccesitatea “forward US military presence in Eurasia” and similar hegemonic policies opposing
the emergence of multi-polarity or of a hegemonic aspirant in Eurasia. Both require the
US to fight wars of credibility to preserve its hegemony in which allies depend on the
US for their security. In practice and prescription, the differences of the two strategies
blur, except the size of military presence and the frequency of armed intervention.31
Likewise, off-shore balancing “posits that the only American strategic interest at
stake in Eurasia is preventing the emergence of a Eurasian hegemon.” Isolationism
assumes that “the balance of power in Eurasia is irrelevant to US security, because evena Eurasian hegemon could not threaten the United States.” Regardless of theirconceptual difference, both are essentially a strategy of burden shifting to the Eurasian

Christopher Layne, The Peace of Illusion: American Grand Strategy from 1940 to the Present (Ithaca, Cornell
University Press, 2006), pp. 159-160.
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balance of power, and, in practice and prescription, only support minimal armed
intervention in the landmass, although the definition of “minimal” differs. 32
The US must make a hard choice between the strategy of hegemony and that ofoff-shore balancing in the context of its relative hegemonic decline, especially after the
post-Lehman Shock fiscal austerity. The strategy of hegemony requires the US to deter
China with the continued military presence in the East Asia and the Western Pacificand, if deterrence fails, to defend US allies vis-à-vis China. In contrast, the strategy ofoff-shore balancing does not seek to maintain global hegemony, instead blocking therise of a Chinese regional hegemon and keeping US economic, political, and military
access to the vital region.
In reality, the two major strategies of hegemony and off-shore balancing vary
according to differing levels of will and capability to intervene overseas. In general, thestrategy of hegemony is constrained more by the lack of capability, given the strong
will. Thus, this strategy may be sustainable if a hegemon can make up its modest
decline in capability by revitalizing the alliance to bolster its presence in the theatre. But
the strategy is no longer sustainable if the decline of capability is substantial, including
the case in which a hegemon seeks to impose its interventionist will and to remainpresent regardless of the policy preferences of allies and potential adversaries. On theother hand, the strategy of off-shore balancing is driven either by the lack of capability
despite the strong will or by the lack of will despite the sufficient capability.
The ASB is only relevant for the strategy of hegemony and has to be rejected if
hegemony is unsustainable. During the Cold War, the US followed the strategy ofcontainment designed to maintain global hegemony. But, as exemplified by thePentagon’s Defense Planning Guidance of 1994 for the fiscal years 1994-1999,33 however,Layne argues that the strategy of hegemony has turned out to be self-defeating because
it has provoked counter-hegemonic balancing by other powers. Because this has led toimperial overstretch involving military entanglement and the weakening of its domestic
economic base;34 the US will have to retract its military power from the East Asia in thenear future, and to return there only if a Chinese hegemonic aspirant poses threats. This
Ibid., p. 160.
www.gwu.edu/~nsarchiv/nukevault/ebb245/doc04.pdf (Accessed: May 24, 2013).
34 Layne, p. 6.
32
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VOLUME 15, ISSUE 3, 2014means that the US simply has to be a counter-hegemonic off-shore balancer, not apeace-keeper.
In January 2012, President Obama officially proclaimed the necessity of reducing
federal fiscal deficits by decreasing defense spending. Essentially, having faced agrowing need of post-Lehman sequestration, the US needs to cut military force
structure, strength, procurement and overhead in order to reach the required savings.
This involves a trade-off between the levels of US global engagement and saving. The
deeper the cuts, the greater the curtailing of or cancelation of expensive, advanced hightech weapon procurement programs essential to realize ASB-based operation. Yet,
Obama also emphasized the need to “deter and defeat aggression,” involving
countering A2/AD challenge with enhanced power projection capability, implicitly,
based on the ASB.35
True, a suboptimal ASB-based operation would be possible with legacy
platforms and systems that are equipped with advanced C4ISR capabilities, which may
only require modest investment and good joint training & exercise. However, such an
approach will not be sustainable for a long time because those platforms and systems
are the results of Reagan-era military build-ups and now have to be extensively
replaced with more advanced thus more expensive ones. This transition will certainly
require far larger investment.
Thus, the fiscal feasibility of building an ASB-based military is criticallyimportant. Barno, Bensahel and Sharp present four budget cuts scenarios, ranging from$350 billion to $850 billion over the next 10 years. The first scenario assumes spending
cuts around $382 billion, aiming at the reposition and reset of the current force
structure, which is designed “to preserve the current US defense plans to the greater
extent possible in an effort to minimize potential vulnerabilities that could occur bychanging those plans too extensively or too rapidly.” This scenario enables
modernization plans, in which the DoD would purchase high-technology weapons toreplace older platforms, lower-technology (but still sophisticated) upgrades to theexisting systems, and innovative new technologies. The scenario ensures that the US

35

The U.S. Department of Defense, Sustaining U.S. Global Leadership: Priority For 21 st Century Defense, 2012.

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military remains capable of addressing a wide range of possible threats around theworld.”36 The ASB will be realizable under the first scenario.
The second scenario includes the spending cuts of $502 billion, yet allows forconstrained global presence primarily in the Western Pacific, Indian Ocean, Middle
East, Arabian Gulf and Mediterranean Basin. The US still has advanced naval and aerial
weapon platforms and a sizable expeditionary ground capability to fulfill its global
missions, but fewer platforms and troops. This scenario, however, takes greater risks,
and accepts longer response times in the other parts of world. The scenario prioritizes
modernization and upgrades of the existing outdated weapons, not the acquisition of
new high-technology weapons. The risks involved in the second scenario may besignificant but acceptable, which barely offers necessary capabilities for the ASB.37
The third scenario encompasses the spending cuts of $665 billion, involving
substantial near-term risks due to far fewer platforms and troops available, anddiminishing single service self-reliance. This scenario reduces the number of nextgeneration manned aircraft and naval vessels that are central to executing a forward
presence strategy across the Pacific and other maritime areas. The scenario does not
suffice to fully realize the ASB, and runs unacceptably high risks.38
The fourth scenario includes the spending cuts of $ 822 billion, focusing on
economy of force and minimizing the burden of defense spending on the US economy.
But this scenario only allows for military capability barely sufficient to defend US coreinterests in a major regional conflict, necessitating the country to shift toward off-shorebalancing. This scenario sends a clear message of receding US power and commitment,
and may lead to the advent of China’s sphere of influence in the maritime East Asiantheatre that is demarcated by what China calls the First Island Chain.39 (The Chain is
usually described as a line through the Kurile Islands, Japan’s main islands, the Ryuku
Islands, Taiwan, the Philippines, and Borneo to Natuna Besar of Indonesia.)David W. Barno, Nora Bensahel, and Travis Sharp, Hard Choices: Responsible Defense in an Age ofAusterity (Washington, D.C.: Center for a New American Century, 2011), pp. 13-14
37 Ibid., pp. 15-17.
38 Ibid., pp. 17-19.
39 Ibid., pp. 20-22.
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At present, it remains to be seen which of the four budget-cut scenarios will
come into reality. Yet, the feasibility of building an ASB-based military will bequestioned if the US is at crossroads of choosing between the third and the fourth
scenario40 and, therefore, between hegemony and off-shore balancing. Otherwise, theASB would be tenable. Thus it deserves examining the major assumptions and basic
operational logic of ASB.

From Deterrence by Denial to Deterrence by Punishment
As China’s A2/AD capability grows, US forward operating survivability will
decline in the East Asia and the Western Pacific. The US military, including aircraft
carriers in littoral waters, faces a major basing disadvantage, and will be less and lessable to operate from effective sanctuaries from enemy attacks. Instead, US forces will
have to rely increasingly on longer-range weapons and more survivable platforms.
Using these power projection capabilities involve a shift from deterrence by denial visà-vis China, based on geographically limited direct defense of Taiwan, to deterrence bypunishment, based on the threat of escalation. Thus the ASB aims to “set conditions at
the operational level to sustain a stable, favorable conventional military balance”,
despite the scarcity of survivable US forward bases, for the next ten to twenty years.41
The US increasingly requires precision strike capability against China’s groundbased war-fighting and war-supporting targets, thereby deterring its escalatory options
at the conventional levels. The capability is essential to destroy or at least neutralize
China’s military’s networks, weapons platforms, long-range ISR and strike systems thatmay deny the freedom of US military action at the beginning of conflict. Then the US
will first be able to withstand China’s initial attack, limit damage to Blue forces andbases, and seize the initiative in the air, sea, space, and cyber domains.

Kunihiko Miyake, a former Japanese senior diplomat, understands that the recent U.S. emphasis on
Asia in the deployment of armed forces is largely symbolic and rhetorical, without reflecting the realities.
He points out that, already in 2010-2011, the navy deployed two-thirds of its aircraft carries andamphibious assault ships in the Pacific and the Indian Ocean, despite its recently announced plan ofshifting 60% of these vessels to the Pacific by 2020. See, Sankei Shimbun, June 14, 2012.
41 van Tol, p. xi.
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Maintaining Tactical/Operational Superiority by ASB
The US not only has to reduce the potential effects of China’s A2/AD measures
but has to strengthen its own strike capabilities to counter these measures as well.42
How can it do this?
First, the US has to strengthen passive and active defense capabilities against
Chinese A2/AD measures. These include missile defense, deployed near criticalfacilities, against ballistic missiles, ship-borne and land-based cruise missiles, antisubmarine warfare (ASW), mine-sweeping, counter-antisatellite (ASAT) attack, andlong-range air defense, while improving C4ISR capability of directing, identifying andattacking mobile time-sensitive targets. To bolster allied capabilities, the US also muststrengthen its port defenses, its defenses against covert operation and reduce
vulnerability of C4ISR systems, and counter the threat of high-altitude nuclear
detonation. Yet, missile defense systems are easily saturated with salvoes of cheaper
Chinese SRBMs43 and ASW operations against modern PLA Navy (PLAN) submarines
are not easy due to their lower acoustic signatures, especially in the noisy littoral waters
within the First Island Chain.
Second, the US has to bolster its long-range ballistic and cruise missile
capabilities against land-based fixed targets on mainland China and its long-range
surface-to-air and air-to-air missile capabilities against mobile targets. Also, ASAT
capability is necessary because China depends heavily on satellites for wider-areasurveillance and communications. To maintain a favorable imbalance of military power,
the ASB puts a premium on new, high-tech platforms that enable these strike measures.
Among a variety of the above counter-A2/AD measures, US priorities will go tostrengthening its air power so that the country can attain air control in the theatre ofoperation centred on Taiwan. This would mean that China would be unable to send its

van Tol summarizes the ASBC’s substance. At the first stages, it has four distinct lines of operations: (1)withstanding the initial attack and limiting damage to US and allied forces and bases, (2) executing ablinding campaign against PLA battle networks, (3) executing a suppression campaign against PLA longrange ISR and strike systems, and (4) seizing and sustaining the initiative in the air, sea, space and cyberdomains. See, van Tol, p.xiii.
43 Marshall Hoyler, “China’s ‘ANTIACCESS’ Ballistic Missiles and U.S. Active Defense,” Naval War
College Review63, no.4 (Autumn 2010).
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advanced manned aircraft to penetrate into the American protected airspace, deliver
guided missiles or munitions, and destroy key hardened military targets. This could not
be achieved with stand-off missiles during the early phase of conflict.
Certainly, American forces could enhance their survivability through mobility,
redundancy, and hardening, such as concrete shelters for aircraft and personnel,
redundant operating surfaces, rapid runways repair capabilities, and survivablecommand and control. Yet, China probably possesses sufficient missile capability toneutralize a significant portion of US air power in theatre, at least at the initial stage ofthe conflict. Similarly, China’s SRBM power could neutralize a significant part of US air
power at the Kadena AB in Okinawa. However, Shlapak estimated in 2009 that the total
throw weight of China’s SRBMs was about 495 tons, or about the amount of explosives
carried by fully-loaded 21 B1-B bombers; ”[t]his is a potent capability, but no means
sufficient to induce Taiwan capitulation and/or enable invasion.”44
Apparently, the initial salvoes of China’s SRBMs would kick into the door forfollow-on attacks by its aircraft armed with PGMs, naval forces, and eventuallyamphibious assault forces for direct invasion of Taiwan and, if necessary, someJapanese islands in its vicinity. It is clear that air control for countering ballistic missiles
is a focal point in a Taiwan contingency.

US Superiority Margin is Narrowing
Given the flying ranges of aircraft, the US military has to rely on air power
projection from the Andersen AB in Guam because China’s A2/AD measures can reachafield up to 1,500 km of the mainland, which only makes Guam relatively safe. That is,
all the US bases in Japan are not safe, including Kadena, Futenma, Iwakuni, andMisawa. The Misawa AB is the only base that is fully hardened, but it is only 1,000km
from China and 2,700 km from Taiwan.
The Andersen-only scenario is highly likely because US aircraft carriers cannot
make up for the Taiwan’s air force (Republic of China Air Force: ROCAF) capability.
44

Shlapk, p. 127.

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They face a growing threat from China’s increasingly accurate land-based anti-ship
missiles. Shlapak also estimates that, even without considering attrition, the ROCAF canproduce at most 650 sorties per day from its 317 fighters. Should ROCAF capability ofgenerating 100 sorties per day survive China’s initial salvoes of missiles, and should 50
fighters on each carrier be assumed to replace lost ROCAF sorties on a one-to-one basis,
the US only could make up 550 sorties by all of the eleven carriers it possesses. Evencalculating by a factor of two, the US still would have to send five carriers. These
options are practically infeasible.45
Certainly, the USAF possesses a pronounced qualitative edge over the PLAAF,
but faces loss of quantitative superiority and tactical flexibility, primarily due to its
serious basing disadvantage. But, the F-22 as well as the still-to-come F-35 only has anaircraft-to-aircraft technological advantage that is meaningful. Gons estimates that
Andersen AB can accommodate at most 250 aircraft,46 and that the base can support
four to five squadrons of fighters. A single counter-air mission would require at least
two aerial refueling each way, one at most 1800 km from Andersen. The base can
support the operation for at most 22 days without a resupply, and with unlimited
resupply for three months.47 The mission needs 3.5 hours transit from Andersen to
Taiwan, with 1.25 hours on station, and another 3.5 hours return flight.48 Gons
calculates that there are only 6 F-22 fighters available for combat air patrol (CAP) overTaiwan, around the clock.49 (Gons also estimates that a force at the Kadena could
sustain roughly a double CAP over Taiwan, due to the distance and the necessarytransit time thereof.50)
On the other hand, the PLAAF has 271 Su-27 Flankers and, by 2015, will have 397
advanced 4th-generation fighters (e.g., Su-27, Su-30, and J-11). The PLAN also will have

Ibid., p. 130.
Ibid., p. 81.
47 Ibid., p. 82.
48 Ibid., p. 83.
49 Ibid., p. 84.
50 Ibid., p. 92.
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71 Flankers.51 The DoD has repored that there are some 490 combat aircraft within
unrefueled operational ranges of Taiwan.52
The Flanker’s combat top radius is 1630 km, sufficient to cover Taiwan without
being refueled. This means that the aircraft can penetrate its airspace even from air
bases deep in mainland China including 41 dual-use airfields within 930 km of
Taiwan.53 The Su-27 force operates from 12 regional air bases, and could sustain 690
daily sorties, or a continuous CAP of roughly 36 aircraft.54 The US F-22 force would beseverely outnumbered by a factor of six.
The F-22 is stealthy and superior when armed with at most 6 beyond-visualrange (BVR) advanced medium-range air-to-air missiles (ARAAMs), 2 joint direct attack
munitions (JDAMS), or 8 guided bomb unit (GBU) small diameter bombs within its
internal weapons bay.55 With 6 F-22s to counter 36 Flankers,56 the USAF would barely
control the sky over Taiwan in relatively equal engagements at long ranges. If
outnumbered markedly, however, the control would not be sustainable because US
counter-air missions would require a 2,900 km flight from Guam.57 This is particularly
true if the PLA employs decoys and older-generation fighters to exhaust F-22s’ BVR
missiles on board. While directly threatening F-22s, the PLA could also send two or
more regiments of aircraft to attack force enablers, such as USAF ISR/AWACS aircraft
and tankers.58 Consequently, USAF airpower might be driven out of the theatre ofoperation centred on Taiwan.

Ibid., p. 85.
Annual Report to Congress, 2012, p. 24.
53 Gons, pp. 84-85.
54 Ibid.,p. 91.
55 Flankers with the latest radar will be able to detect stealthy aircraft, which makes USAF forces lessdominant. See, Ibid., p. 97.
56 Certainly, this assumes the initial engagement is conducted with 6 F-22s. If the initial contact may
involve a greater number of F-22s, such an operation will not be sustainable around the clock.
57 Ibid., p. 95.
58 Ibid., p. 104.
51
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ASB’s Limits and Implications
The US and China today face a stability–instability paradox in which they cansafely engage in a minor conflict only at a conventional level. In order to avoid a nuclear
war, neither can start a major, direct and full-scale conflict nor allow a minor indirectconflict to escalate into a major conflict. Given the dynamics, therefore, a Taiwan
contingency would be fought safely only at the conventional level, without escalating
into a major nuclear war.
The ASB is tenable as long as it helps maintain a favorable imbalance of military
power, deterring a China that possesses a rapidly growing A2/AD capability. The
concept involves employing escalatory responses at the conventional level, but assumes
that a Sino-US conflict would not surely escalate into a full-scale nuclear war. This also
assumes that the US will be able to keep the conventional edge and thus not need
nuclear response against China. Concurrently, the concept assumes that China would
be confident of its minimal nuclear deterrence vis-à-vis the American nuclear
superiority.
The optimism of deterrence will surely flounder if these assumptions fail to hold.
China might undertake a military venture against Taiwan, despite probable US
conventional and nuclear retaliation. More specifically, China’s employment of A2/AD
measures could risk both horizontal and vertical escalation that would broaden thegeographic scope and increase the intensity and destructiveness of the conflict.
American stand-off and penetrating strikes against targets in mainland China, as well as
PLA ASAT systems, have escalation implications.
The US dilemma is inherent in the geographical asymmetry of the East Asia andthe Western Pacific in which Taiwan lies close to rising China and far away from therelatively declining United States.59

The American ability to guarantee Taiwan’s

security vis-à-vis China is increasingly in question.

The Cuban missile crisis of 1962 is a parallel to a Taiwan contingency. Habana is about 380 km from
Miami, while roughly 9,600 km from Moscow. In the crisis, U.S. dominance in the Caribbean posed aconventional threat to Cuba, but the Soviets could only offset the threat with nuclear threat. The securityof Cuba as a Soviet outpost depended on the effectiveness of Moscow’s extended nuclear deterrence
commitment to Habana. Ultimately, the security rests on Soviet asserted willingness to risk nuclear
conflagration in defense of its interests. If China’s military power continues to grow, the U.S. will not be
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When conventional escalatory response is not sufficient, the US has to shift fromdeterrence based on denial to deterrence based on punishment involving nuclear
retaliation. Thus, China’s growing A2/AD capabilities are significant because, even if a
Sino-US conflict is unlikely, they would increase US inhibitions vis-à-vis a more risktaking China. The US will be presented with two difficult choices between escalationand non-involvement. The US might back down, rather than dare to retaliate.
Even if the US should possess overwhelming military power, China would notnecessarily submit to the US, trapping the two into an escalation spiral. Certainly, theUS could try to shape the escalatory dynamics by declaratory policy and force
development in order to signal American commitment and preparedness to full-scale
retaliation, if necessary. Yet, there is motivational asymmetry and an imbalance ofresolve between the US and China, and between US extended nuclear deterrence to
Taiwan and China’s direct deterrence to prevent US intervention. Taiwan is important
for China for substantive and symbolic reasons, while it has no intrinsic value to the US
nor to America‘s own interests. As a PLA general mentioned in 2005, “the US cares
more about Los Angeles that Taipei.”60 It remains uncertain if the US would run the riskof defending an ally. (It may be possible to argue for the absolute strategic andideological values of Taiwan. But, as discussed here, under some strategic andoperational conditions, defending Taiwan will cost prohibitively high and practically
impossible. Simply put, it can be hardly assumed that the US would care more about
Taipei than it would do about L.A.) Alternatively, the US could fight in the East Asian
peripheries to retain its credibility vis-à-vis regional allies, arguably part of its own coreinterests as a global hegemon. With no vital interests at stake, US extended nuclear
deterrence would become less and less credible as China’s second-strike nuclear
deterrent becomes more survivable. The survivability can be significantly enhanced bydefeating US missile defense, for example, through mobile ICBMs, SLMBs, multiple
independently targetable reentry vehicles (MIRVs), and penetration aids.

able to rely on a decreasingly credible conventional deterrent in the immediate theater, but only on
broader extended deterrent commitments involving more destructive conventional capabilities, tactical
nuclear weapons, and ultimately strategic nuclear weapons. See, Shlapak, p. 146.
60 Patrick Tyler, "As China Threatens Taiwan, It Makes Sure U.S. Listens," New York Times, January 24,
1996.

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Once the dynamics of A2/AD and counter-A2/AD are engaged, China would
probably attack US bases in Guam and even Hawaii, while bringing Japan and South
Korea into conflict. Should Japan find US nuclear umbrella largely effective but porous,
the US would have to facilitate or at least to acquiesce Japan’s acquisitions ofsupplementary capabilities, including a secure second-strike nuclear deterrent andpower projection capabilities of defending its territory and SLOCs. The two countries
might choose the reduced but continued presence of US bases in Japan. Furthermore,should the two recognize the umbrella ineffective and find it undesirable to put Japanon China’s orbit, they would even make Japan a great power that is strategicallyindependent.
From a Japanese perspective, therefore, ASB works well as long as it successfully
deters China’s aggression. This depends on if the US can build effective ASB-based
capability and if China perceives so. If not, an ASB-based war over Taiwan would likely
drive the US to escalate into a nuclear war, which may turn out to be very destabilizing
and potentially devastative. Given that the ASB is a US response to China’s aggressive
A2/AD-focused arms buildups, not vice versa, regional strategic environment will not
likely change soon. Practically, the consequence will be reduced to the fiscal feasibility
that the US faces, now increasingly seriously under the ongoing sequestration. Unless
the US come up with an alternative approach or strategy that is less destabilizing, 61
Japan cannot but coordinate its defense policy in a way to enhance ASB’s deterrence
effect as related to a possible Taiwan contingency.

A Policy Proposal for the US, Japan and Taiwan
There exists a high correlation between defense spending and military power, atleast in the middle to long term. Certainly, specific military capabilities could greatly
vary according to differing levels of technological, organizational, doctrinal

This paper is an assessment of the ASB. A comparative analysis of ASB, “rebalance/pivot”, and“offshore control,” especially, which one of the three competing approaches is the most relevant
approach for the US and Japan, is beyond the scope of this paper, although very important andintriguing. For “rebalance”, Phillips C. Saunders, “The Rebalance to Asia: US-China Relations andRegional Security,” Strategic Forums no. 281 (August 2013). For “offshore control,” see, T.X. Hammes,”Offshore Control: A Proposed Strategy for an Unlikely Conflict,” Strategic Forums, no. 278 (June 2012).
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VOLUME 15, ISSUE 3, 2014sophistication, but fiscal ability to invest in armament and manpower serves as a roughmacro-indicator of a country’s middle- and long-term military power.
The optimistic, realistic, and pessimistic scenarios below are constructedaccording to modest, medium, and large defense spending cuts respectively that the US
would face, involving subsequent differing fiscal constraints on investment inarmament and manpower. As discussed earlier, the optimistic scenario assumes
spending cut of $382 billion for ten years, the realistic one does the cut ranging from$502 billion to $665 billion, and the pessimistic one does the cut of $822 billion. The
Quadrennial Defense Review of 2014 corresponds to the lowest cut level of the realistic
scenario.
Japan, thus, needs to focus on military policy coordination with the US andTaiwan. The three cannot formally cooperate and collaborate with one another inmilitary cooperation, given Japan’s constitutional constraints and Taiwan’s lack of its dejure state status and, therefore, formal alliance relationship under international law. But
Taiwan is not simply an object. Its survival as a de facto political entity, particularly its
resiliency not to capitulate against China for an extended period time, is essential for air
and sea control in the East and South China Seas and the Western Pacific. The island is
indispensable to maintaining US military predominance in the theatre and defending
Japan’s southbound sea lanes of communication that is essential for its trade, including
the imports of oil and gas from the Persian Gulf.

The Optimistic Scenario
The USIn this scenario, the US has to take passive and active defense measures tocounter China’s A2/AD, as long as the US keeps the favorable regional imbalance ofmilitary power. This scenario includes the case in which the US should somehow
revitalize its hegemony or which China’s rise should considerably decelerate, althoughboth seem very unlikely at present. These measures cost least.

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JOURNAL OF MILITARY AND STRATEGIC STUDIESThe US priority has to be put on building sufficiently hardened shelters for all
the 108 F-15s in the Kadena AB and those for 36 Marine F/A-18s in the Iwakuni locatedon the largest one of Japan’s four main islands.
Japan
The priority will go to dispersing the Air Self-Defense Force aircraft acrossseveral major civil airports in the Okinawa Islands, rather than hardening the dual-use
Japan Air Self-Defense Force (JASDF) Naha Air Base. These airports can receive
reinforcements with JASDF aircraft from the Japanese main islands.
TaiwanFirst, Taiwan has to further strengthen early strategic and tactical warning
capabilities, thereby substantially reducing the potential effects of various Chinese
A2/AD measures. This is because even a fairly short warning period should be adequate
to allow Taiwan to disperse it helicopters to prepared, hidden operating points and tomove some fixed-wing aircraft, away from main operating air bases to highway strips.
Second, Taiwan has to take more passive defense measures, such as camouflage,
concealment, and deception to forces, bases, and facilities, and strengthen active
defensemeasuressuchassurface-to-air

missilesandelectronic

warfaremeasures/countermeasures.
Third, Taiwan has to further emphasize on the preservation of its air power
against PGMs, submunition-armed weapons, and guided weapons. For this purpose,
Taiwan has to build more hardened shelters at the air bases and large undergroundhangers in the mountains such as those already built in Hualian and Taitong, highly
redundant or reconstitutable command and control systems, underground storage ofand buried distribution systems for fuels, well protected war-reserve stockpiles of SAM
radars, launchers, and missiles.62 These measures will be instrumental in exhausting
China’s inventory of missiles.

62

Shlapak, p. 128.

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The Realistic Scenario
The USIn this scenario, the US has to take force-to-force conventional offensive
measures to counter steadily growing and improving China’s A2/AD capability,
avoiding risks of horizontal and vertical escalation. This approach is relevant as long as
the US enjoys a favorable imbalance of military power.
As it is very difficult to achieve local parity in the number of aircraft with the
PLAAF in the Andersen base-only scenario, the US must dramatically increase its onstation missile magazine, through sortie-generation or not, thereby possessing a battlewinning air capability. Yet, the US must not externally arm F-22s, depriving the aircraftof stealth as a decisive tactical advantage and instead employing them for cooperative
targeting with older, legacy aircraft, such as F-18s and F-15s. F-22s can direct via
datalink the legacy aircraft to shoot and guide air-to-air missiles against PLAAF aircraft.
This would be made possible by increasing Andersen AB’s capacity, centred on
development of its Northwest Field, and by deploying maximum-on-ground F-15Cs in
addition to F-22s.
Alternatively, as Gons proposes, the US could modify a B-1 bomber, whose radar
signature is one fifth of B-52,63 to carry a large number of BVR missiles. B-1 could be an
air-superiority bomber that is hard to be detected, if not stealthy. The bomber would
not be vulnerable to PLAAF aircraft armed with long-range missiles - the equivalent of
the Russian Vympel R-37 with an effective range of 343 km and Novator R-172 with arange of 457 km. This is because, with the B-1’s turning radius of 22 km and a stand-off
BVR missile on board, with a range of more than 481 km, the bomber would be able toconduct an out-of-range strike and still dash away from a Flanker’s missile.64 The
bomber’s performance could be significantly improved by using two stage missiles, asubsonic cruise missile with a supersonic terminal stage, similar to Russian missiles.65

Gons, p. 134. US anti-surface capabilities have atrophied some time since the end of the Cold War.
Historically, the USAF has allocated spending between fighters and bombers at 2:1 ratio. But, since 2002,
the ration has been at 30:1 in favor of fighters. See, Ibid., p. 79.
64 Ibid., p. 137.
65 Ibid., p. 146.
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JOURNAL OF MILITARY AND STRATEGIC STUDIESWith a parametric analysis, Gons calculates that 6 F-22 fighters plus two B-1 bombers
can carries 96 to 124 BVR missiles in total, depending on standoff AAM ranges from 370
km to 556 km.66
Japan
The existing joint JASDF/JMSDF (Japan Maritime SDF) Air Base at Iwo To, aJapanese solitary island in the Western Pacific, could be further developed, according to
the similar rational behind the Andersen-only scenario. Yet, due to its topographic
feature, the island neither has a port nor a harbor to carry in fuels and other logisticalmaterials. Based on the bilateral alliance with the US, JASDF fighters could use parts ofthe expanded Andersen air base or alternative airports in the Marianas, such as on theisland of Tinian, for rotational deployment.67
Also, Japan would have to cope with a small-scale contingency over the Senkaku
Islands, independently or as part of a Taiwan contingency,68 as demonstrated by the
recent report that the SDF has already made an operational plan to recapture theSenkaku from China’s invasion forces.69 This study has shown that there is a highcorrelation between the capability necessary to defend Taiwan and that to defend Japan,
especially Okinawa; the US bases in Okinawa would play critical roles in both. Already,the US has officially announced its observation of Article 5 of the U.S-Japan Mutual
Security Treaty that requires the country to help Japan defend the islands against
China’s aggression. Thus, Japan would have to possess military capability at leastsufficient to resist until the US enters the Sino-Japanese battle, such as limited
Ibid., p. 152.
The US and Japan have explored to use bases in the Philippines for combined training between SDF
and Marine troops. See, Sankei Shimbun, April 28, 2012.
68 Shibayama contends that, given the operational logic of China’s A2/AD, Japan has to put priority on an
Okinawa-main-island contingency scenario. He also compares and contrasts six contingency scenarios(Taiwan, the Senkaku islands, the Yaeyama-Miyako islands, the Okinawa main island, the South China
Sea, and air battle) in light of the prospect for operational success, the danger of escalation, China’s
expected military outcome, the availability of China’s domestic political exit, and the availability of
China’s diplomatic exit. He judges that China could prevail at least at the initial phase of the Okinawa
contingency scenario and possibly, if not probably, win the battle, without committing significant risks
for escalation, because China might prevail thoroughly and find domestic political and diplomatic exits.
See, Futoshi Shibayama, “US-China Power Transition and Japan’s Hard Power,” Kokusai Anzen Hoshou:
The Journal of International Securit, 39, no. 4 (2012).
69 Sankei Shimbun, May 9, 2012.
66
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amphibious assault capability and joint air and naval capability emulating after theASB.70
TaiwanTaiwan would have to possess limited, mobile-TEL-based, long-range missile
strike capability against key fixed military targets in mainland China, including aircraftin the open, airbases, and other supporting facilities. This is the most cost-effective
offensive option against China’s A2/AD capability, as the country itself has chosen visà-vis the US. This means Taiwan should not further invest in expensive high-techplatforms such as advanced aircraft and naval vessels.

The Pessimistic Scenario
The USWith a conspicuous imbalance of conventional military capability in China’sfavor, it would be very difficult for US military aircraft to penetrate China’s airspace
under its robust air defense or to dispatch aircraft carriers in the near waters, withoutcommitting significant risks. In this scenario, the US also lacks the ability to conduct
prompt non-nuclear strikes against critical time-sensitive targets or critical targets
situated deep inland, such as mobile launchers. Should it possess the ability, the US
would quickly exhaust peacetime inventories of PGMs in a high-intensity war against
China.
As Overcash argues, the US would have to abandon or lessen active defense
involving heavy logistic requirements because it relies on air superiority over mainland
A Senkaku contingency requires Japan to formulate an operational plan against Chinese aggression
alone for a considerable period of time during which the U.S. forces temporarily withdraws from thetheater to prepare for a full-scale counter-offensive. See, Matsumura, Masahiro, “Chuugoku No Taitou to
Nichibei-Kankei no Tenbou (China’s Rise and the Prospect for US-Japan Relations),” Seiron, no. 48 (May2012); Masahiro Matsumura, “An Inquiry into ‘the Dynamic Defense Capability’ As the Key Concept ofJapan’s New Defense Strategy: Its Implications and Policy Issues” Momoyama Hougaku: St Andrew’s
University Law Review, no. 9 (2012); Fuse proposes a more drastic buildup of SDF’s counter-A2/AD
capability, by raising necessary funds through the SDF’s all-out restructuring and reorganization. See,
Satoru Fuse, “Japan’s Anti-Access Defense Strategy,” Kokusai Anzen Hoshou 39, no. 3 (2011).
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China and on active BMD that would be easily saturated with salvoes of China’s
missiles. Instead, the US would have to focus more on sea/undersea control and thestrengthening of battle networks/sensors,71 employ denial and deception techniques sothat it could minimize the accuracy of China’s ballistic missile attacks, and use surfaceto-air anti-cruise missiles in the theater centered on Taiwan,
Alternatively, the US would be forced to focus on conventional offensive against
PLAAF’s capability of sortie-generation. This involves counter-attacking China’s air
bases, such as strike campaigns against the radar/space facilities and ballistic missiles
facilities as well as the aircraft and air base infrastructures including runways, fuels,
and maintenance. Against these targets, the US could employ F-22s and B-1 bombers
loaded with stealthy joint long-range air-to-surface standoff missiles (JASSMs) rather
than Tomahawk land-attack missiles (TLAMs). Also, the US could develop and use
several hundreds of new MRBMs similar to Pershing II once deployed in Europe in the
1980s, equipped with MIRVed or MaRVed conventional warheads, against China’s air
bases in Nanjing and Guangzhou military districts. These attacks could be launchedfrom US bases in Guam and other islands in the Marianas. 72 In addition, the US canemploy the existing four Ohio Class guided missile submarines (SSGNs) as major
platforms, at least until they retire in the mid 2020s. As well, they could convert
Virginia-class attack submarines (SSN) into SSGNs.
Without sufficient funds, however, the US would be unable to take the above
conventional counter-A2/AD measures and thus fail to deter and, even if necessary,defeat China at the conventional level. Instead, the US would have to rely on nuclear
escalatory response or simply back down, finding itself at crossroads of choosing
between the strategy of hegemony and that of off-shore balancing. Should the US backdown or be perceived to do so, Japan would see the US nuclear umbrella porous and, as
the result, partially ineffective even under the strategy of hegemony.

David M. Overcash, “Through the Lens of Operational Art: Countering People’s Republic of China(PRC) Aggression in a Limited Conflict using Innovative Ways and Cost-Effective Means to Offset PRC
Anti-Access Area Denial (A2AD) Capabilities,” (Paper submitted to the Faculty of National War College
in partial satisfaction of the requirements of the Joint Military Operations Department, October 25, 2010),
p. 7.
72 Shlapak, p. 133.
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Japan
Japan, then, would be compelled to have to fix the porous umbrella bypossessing a minimal survivable nuclear deterrent, while concurrently deploying
conventional long-range land-attack missiles. This could be readily achieved with US
support, including a bilateral nuclear-sharing agreement assuring transfer of tactical
nuclear warheads to Japan during wartime or production technology transfer of thesewarheads. While these warheads could be loaded on land-attack cruise missiles to belaunched from JMSDF conventional submarines, the US could lease SSNs and/or SSGNs
to Japan, or transfer their nuclear-reactor technologies to the country. Should the US be
unwilling to take these concrete measures, Japan would seriously lose its confidence inbilateral alliance, eventually dismantling the alliance. Then Japan would have to
become strategically independent with significant nuclear power or to accept being on
China’s orbit.
TaiwanTo avoid provoking China and alienating the US, Taiwan practically possesses
no option to go nuclear. Taiwan would have to possess sufficient military capability
against China’s direct invasion aiming to achieve the island’s capitulation. Yet, thePLAN does not have sufficient sealift and amphibious assault capability to prosecute an
outright invasion. With a properly prepared defense, Taiwan could resist effectively
against the China’s invasion. The PLAN’s fleet of amphibious shipping will remainmodest relative to the magnitude of requirements for assaulting Taiwan. The 100-ship
amphibious Chinese force projected by Shlapak would only be able to transport about aforce 31,000 strong at a time in the first 10 to 20 days.73
Taiwan would need to build reasonably robust, layered defense even without
friendly air superiority, requiring more investment in (i) long-range JASSMs, anti-ship
missiles, such as Hsiung Feng, and ASCMs launched from sea, air, and shore, (ii) mines,(iii) shorter-range missiles from helicopters, such as Hellefire, and fixed/mobile
launchers against amphibious assault ships, (iv) artillery, rockets, and mortar fire73

Shlapak, p. 119.

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against tanks, such as tube-launched, optically-tracked, wire command data link,
guided missile (TOWs).
At present, the realistic scenario appears most relevant because the balance ofpower in general and that of military capability in particular will unlikely make adrastic shift in China’s favor. But, the pessimistic scenario won’t be totally excluded
given the evolving uncertainties of the global market economy, the US economy, and its
fiscal conditions.74

The informed Japanese increasingly see that drastic cuts in U.S. defense spending are very likely. See,
Nikkei Shimbun, June 16, 2012; and, Sankei Shimbun, June 20, 2012.
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