61. Avoiding the Brink: Escalation Management in a War to Defend Taiwan
- Author:
- Stacie L. Pettyjohn and Hannah Dennis
- Publication Date:
- 02-2023
- Content Type:
- Special Report
- Institution:
- Center for a New American Security (CNAS)
- Abstract:
- The United States is entering an unprecedented multipolar nuclear era that is far more complex and challenging than that of the Cold War. This report examines potential triggers, thresholds, and targets for Chinese nuclear use as well as options for the United States and its allies and partners to avoid and manage escalation. It uses the results of two exploratory tabletop exercises (TTXs) focused on how China’s expanding nuclear arsenal could impact the risk of nuclear escalation in a conventional conflict over Taiwan. From these two TTXs, the authors derived tentative insights into how nuclear escalation in a war over Taiwan might unfold and identified areas where further research is needed. First, the expansions and improvements projected for China’s nuclear forces will provide it with a wider range of coercive options. With a secure second-strike capability and more diverse theater nuclear options, China may be willing to brandish its nuclear weapons to attempt to deter the United States from entering a war. There are few incentives to conduct nuclear strikes early in such a conflict, but a war over Taiwan might well lead to a protracted war between the great powers—another area where more study will be critical. The authors also found that American policymakers today might not find the PRC’s nuclear threats credible because of its smaller arsenal size and historic policy of no first use (NFU). Furthermore, the authors found that attempts to degrade key conventional capabilities might lead either side to cross the other’s red lines, setting off an escalatory spiral and transforming a regional conflict into a great-power war. Both the United States and China will have to weigh the value of eliminating certain targets with the risk of crossing an adversary red line. Last, the authors found an asymmetry between the targets available to the United States and China in a Taiwan contingency. With fewer categories of targets to strike and types of capabilities with which to strike them, the United States may have fewer options to manage escalation. All these findings merit further study. The two TTXs, conducted in summer 2022, pitted a U.S. Blue team against a Chinese Red team in a war over Taiwan. The two wargames were designed as a controlled comparison to focus on the impact of one specific variable—the size and composition of the PLA’s nuclear arsenal—on the Red team’s decision-making and its propensity to deliberately escalate and on the Blue team’s ability to defend its allies and partners while managing escalation. By holding most other factors constant but changing Red’s nuclear force structure, the authors aimed to concentrate on the role that nuclear weapons played. In TTX 1, the players had a notional 2027 order of battle with a nuclear arsenal of about 700 warheads, diverse in yield and delivery system type and range. The second TTX, set in 2030, included a similarly diverse Red arsenal of over 1,000 nuclear warheads. After analyzing the results of both exercises, the authors contextualized and expanded the findings through research on existing literature on nuclear deterrence and escalation.
- Topic:
- Security, Defense Policy, Nuclear Weapons, and Escalation
- Political Geography:
- Taiwan, Asia, and United States of America