In March 2021, Admiral Philip S. Davidson, then commander of U.S. Indo-Pacific Command, told the Senate Armed Services Committee that Beijing was accelerating its ambition to supplant the United States and its leadership role in the rules-based international order. Davidson warned that China appeared to be moving forward the timeline for goals it had long said it hoped to achieve by around 2050. Seizing Taiwan, he assessed, was clearly one of Beijing’s major objectives before then, and the threat could manifest during the 2020s, possibly within the next six years.
Davidson’s written testimony also noted that Beijing had announced plans to accelerate military modernization in time for the People’s Liberation Army’s (PLA) centennial in 2027. Since then, 2027 has become an important marker in debates over PLA capabilities and the risk of conflict in the Taiwan Strait.
But the so-called “Davidson window” should not be read as a war calendar.
Davidson’s comments were initially interpreted by media outlets and analysts as suggesting that 2027 was China’s timetable for using force against Taiwan. U.S. intelligence assessments have since made that interpretation more cautious. The Office of the Director of National Intelligence’s 2026 Annual Threat Assessment stated that Chinese leaders do not currently plan to execute an invasion of Taiwan in 2027 and do not have a fixed timeline for achieving unification.
Former CIA Director William J. Burns made a similar distinction. He said U.S. intelligence indicated that Xi Jinping had instructed the PLA to be ready by 2027 to conduct a successful invasion of Taiwan. But Burns also emphasized that this did not mean Xi had decided to invade in 2027, or in any other specific year.
The U.S. Department of Defense’s 2025 report on China’s military development pointed in a similar direction. Beijing’s pressure campaign against Taiwan is not limited to military preparations for a full-scale invasion. It combines diplomatic, informational, military, and economic tools to advance unification objectives below the threshold of war. The report also discussed “coercion short of war” as a possible Chinese option, including limited military actions, economic pressure, diplomatic isolation, information manipulation, and cognitive warfare designed to force Taiwan into negotiations or political concessions.
Of particular concern is the possibility of a joint blockade campaign. China could use air and maritime blockades to cut off Taiwan’s critical imports, while combining those measures with electronic warfare, cyberattacks, and information operations to compel Taiwan to negotiate or surrender.
Taken together, these assessments suggest that Beijing is more likely, at least for now, to keep shaping conditions for eventual cross-strait unification through measures below the threshold of armed conflict rather than immediately launching a full-scale invasion.
For Taiwan, the more immediate danger is therefore not necessarily a sudden full-scale war in a specific year. It is the continued maturation of Beijing’s ability to coerce Taiwan into talks through gray-zone pressure.
The “Davidson window” is best understood as a “capability window.” It does not identify a date by which war must occur. It marks the point at which Beijing’s military power, combined with multiple instruments of coercion, may become increasingly useful for applying pressure against Taiwan.
Yet military capability alone is not enough to assess the risk of war in the Taiwan Strait. The PLA does not decide on its own whether to fight. The final decision rests with Xi Jinping.
This means another window must be considered alongside the “Davidson window”: a “confidence window.” This refers to Xi’s confidence in the PLA’s loyalty, command structure, equipment, and real combat effectiveness to achieve his objective. It can be called the “Xi window.”
The “Davidson window” asks whether the PLA is ready to fight. The “Xi window” asks whether Xi trusts the PLA enough to fight and win.
This distinction matters because China’s military command and defense-industrial systems have been shaken in recent years by corruption investigations and political purges. The removal of senior officers, and the problems inside the Rocket Force and Equipment Development System, are not merely questions of discipline or loyalty. They also affect Xi’s judgment of the PLA’s reliability.
If Xi doubts the loyalty of senior commanders, the integrity of weapons systems, or the real combat effectiveness of his military, he may hesitate to launch a full-scale operation against Taiwan even if PLA capabilities continue to improve. In the short term, such doubts may restrain the most extreme military option. But they may also increase Beijing’s reliance on gray-zone tactics.
That does not mean pressure on Taiwan will decline. Instead, the level of risk may change. High-intensity war could be delayed, while coercion below the threshold of war becomes more frequent, more sophisticated, and more integrated.
The key question is not simply when a war might break out. A more useful strategic question is how the “Davidson window” (capability window) and “Xi window” (confidence window) interact. Do they overlap? Does one arrive before the other? Different answers point to different forms of coercion.
If the two windows overlap, the Taiwan Strait would enter a genuinely high-risk period. Beijing would believe both that its military capabilities were approaching maturity and that the PLA was loyal, dependable, and operationally ready. In that scenario, Taiwan could face a combination of blockade operations, precision strikes, pressure against offshore islands, and higher-intensity joint military coercion. A large-scale amphibious invasion would still be the most difficult and dangerous option, but it would become part of a broader coercive menu.
If the “Davidson window” opens before the “Xi window,” the risk would look different. China’s military capabilities would continue to grow, but Xi would still lack full confidence in the force. Beijing would then be more likely to continue a strategy of using military pressure to force negotiations. Military exercises could become more routine. Blockade rehearsals could become more institutionalized. China Coast Guard enforcement operations could become more aggressive. Cyber operations and cognitive warfare could become more advanced. Pressure would continue, but below the threshold of war.
The reverse scenario is also dangerous. If the “Xi window” opens before the “Davidson window,” political pressure and Xi’s subjective confidence could run ahead of genuine military readiness. In that case, the greatest danger will not be a mature full-scale invasion, but a premature or limited act of military adventurism. Beijing could escalate through an air or maritime blockade, pressure on Taiwan’s offshore islands, cyber and electronic attacks, or other gray-zone actions. The subsequent path would depend heavily on the leader’s political objectives and tolerance for escalation.
Taiwan should not base its national strategy on predicting whether a full-scale war will occur in a particular year. The more important task is to prepare for different combinations of capability, confidence, and coercion, depending on how the “Davidson window” meets the “Xi window.”
That requires sustained political and military wargaming, stronger deterrence, deeper social resilience, and a greater capacity to endure long-term pressure. Taiwan’s goal should not be merely to guess when Beijing might act. It should be to ensure that even if Xi’s confidence window opens, Beijing still sees a capability gap that makes coercion costly, uncertain, and unlikely to succeed.
