The Buzz

A War Between the U.S. and China Would Be World War III (And Might Be Hard to Shut Off)

The window for war between the United States and China will, in all likelihood, last for a long time. Preventing war will require tremendous skill and acumen from diplomats and policymakers. Similarly, the demands of positioning either side for victory will continue to tax diplomatic, military, and technological resources for the foreseeable future. At the moment, however, we shouldn’t forget that China and the United States constitute the heart of one of the most productive economic regions the world has ever seen.

How does the unthinkable happen? As historians continue to contemplate the various historic anniversaries around World War I through next year, the question of unexpected wars looms large. What series of events could lead to war in East Asia, and how would that war play out?

The United States and China are inextricably locked in the Pacific Rim’s system of international trade. Some argue that this makes war impossible, but then while some believed World War I inevitable, but others similarly thought it impossible.

In this article I concentrate less on the operational and tactical details of a US-China war, and more on the strategic objectives of the major combatants before, during, and after the conflict. A war between the United States and China would transform some aspects of the geopolitics of East Asia, but would also leave many crucial factors unchanged. Tragically, a conflict between China and the US might be remembered only as “The First Sino-American War.”

How the War Would Start: 

Fifteen years ago, the only answers to “How would a war between the People’s Republic of China and the United States start?” involved disputes over Taiwan or North Korea. A Taiwanese declaration of independence, a North Korean attack on South Korea, or some similar triggering event would force the PRC and the US reluctantly into war.

This has changed. The expansion of Chinese interests and capabilities means that we can envision several different scenarios in which direct military conflict between China and the United States might begin. These still include a Taiwan scenario and North Korea scenario, but now also involve disputes in the East and South China Seas, as well as potential conflict with India along the Tibetan border.

The underlying factors are the growth of Chinese power, Chinese dissatisfaction with the US-led regional security system, and US alliance commitments to a variety of regional states. As long as these factors hold, the possibility for war will endure.

Whatever the trigger, the war does not begin with a US pre-emptive attack against Chinese fleet, air, and land-based installations. Although the US military would prefer to engage and destroy Chinese anti-access assets before they can target US planes, bases, and ships, it is extremely difficult to envisage a scenario in which the United States decides to pay the political costs associated with climbing the ladder of escalation.

Instead, the United States needs to prepare to absorb the first blow. This doesn’t necessarily mean that the U.S. Navy (USN) and U.S. Air Force (USAF) have to wait for Chinese missiles to rain down upon them, but the United States will almost certainly require some clear, public signal of Chinese intent to escalate to high-intensity, conventional military combat before it can begin engaging Chinese forces.

If the history of World War I gives any indication, the PLA will not allow the United States to fully mobilize in order to either launch a first strike, or properly prepare to receive a first blow. At the same time, a “bolt from the blue” strike is unlikely. Instead, a brewing crisis will steadily escalate over a few incidents, finally triggering a set of steps on the part of the US military that indicate to Beijing that Washington is genuinely prepared for war. These steps will include surging carrier groups, shifting deployment to Asia from Europe and the Middle East, and moving fighter squadrons towards the Pacific. At this moment, China will need to decide whether to push forward or back down.

On the economic side, Beijing and Washington will both press for sanctions (the US effort will likely involve a multilateral effort), and will freeze each others assets, as well as those of any co-belligerents. This will begin the economic pain for capital and consumers across the Pacific Rim, and the rest of the world. The threat of high intensity combat will also disrupt global shipping patterns, causing potentially severe bottlenecks in industrial production.

How do the Allies Respond: 

Whether US allies support American efforts against China depends on how the war begins. If war breaks out over a collapse of the DPRK, the United States can likely count on the support of South Korea and Japan. Any war stemming from disputes in the East China Sea will necessarily involve Japan. If events in the South China Sea lead to war, the US can probably rely on some of the ASEAN states, as well as possibly Japan. Australia may also support the US over a wide range of potential circumstances.

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