The wars stretching American military resources across Europe and the Middle East are creating a new question for deterrence in the Taiwan Strait. Months of fighting with Iran have consumed large quantities of advanced interceptors and long range weapons that would also matter in a conflict with China. This does not mean Beijing has suddenly gained an easy path to Taiwan, but depleted inventories could temporarily reduce Washington’s ability to sustain several demanding military campaigns at once. For Chinese planners, that change is one more variable to consider when judging American readiness.
The pressure is particularly acute in missile defense. The Center for Strategic and International Studies estimates that US Patriot interceptor inventories have fallen below 1,000 and THAAD stocks to roughly 250 after extensive use against Iranian missiles. Replacing many of these weapons cannot happen quickly because specialized production lines have limited annual capacity. A separate CSIS study concludes that rebuilding stocks of systems including Tomahawks, Patriots, and THAAD interceptors will take years rather than months.
A temporary vulnerability is not an invasion timetable
The military consequences for Taiwan are real because a conflict in the western Pacific would depend heavily on missiles, air defenses, naval weapons, drones, and long range precision strike systems. Yet stockpile shortages alone offer little evidence that Chinese President Xi Jinping has decided to invade Taiwan before a particular date. Beijing would also have to weigh Taiwan’s defenses, the difficulty of an amphibious assault, economic consequences, military readiness, and the possibility of intervention by the United States and its regional partners.
Analysts at Brookings argue that depleted American stocks are concerning but unlikely on their own to destroy deterrence. A decision to attack Taiwan would expose China to extraordinary military and economic risks that extend well beyond calculations about American missile inventories. The distinction matters because a temporary weakness can encourage greater Chinese pressure without necessarily making full scale invasion rational.
Beijing is nevertheless maintaining that pressure. China recently conducted live fire exercises in the Taiwan Strait, while Chinese aircraft and naval forces continue operating around the island. Taiwan has responded by making its own drills less predictable and more closely connected to wartime conditions, including scenarios in which Chinese exercises suddenly become preparations for a real attack.
Taiwan is trying to make the window less useful
Taipei is also investing heavily in the weapons most likely to complicate a Chinese assault. Taiwan has proposed raising its 2027 defense budget by 18 percent to a record level above 3 percent of GDP, with additional spending directed toward drones, missiles, submarines, and other modernization programs. Its recent Han Kuang exercises have also tested dispersing weapons production and converting civilian factories to military purposes if Chinese strikes damage normal supply centers.
Washington has moved in the same direction despite the strain on its own arsenal. The Trump administration approved a major package of loitering munitions and surveillance drones as part of a broader 11.1 billion dollar arms package for Taiwan. Other approved systems include HIMARS, Javelin missiles, artillery, and communications equipment intended to strengthen Taiwan’s ability to resist an attack before substantial outside assistance arrives.
The larger weakness lies in America’s defense industrial base. The Pentagon has increased funding for missile production and supply chain expansion, while new programs seek to bring more commercial manufacturers into emergency defense production. Money, however, cannot instantly create factories, trained workers, rocket motors, or specialized components.
US munition depletion therefore creates a genuine strategic vulnerability without producing a predictable countdown to war. The greater danger is that Beijing could interpret American overstretch as an opportunity to intensify military pressure, blockade rehearsals, or coercive operations short of invasion. Restoring deterrence requires more than rebuilding US stockpiles. It also requires accelerating Taiwan’s own ability to survive the opening stages of a conflict so that no temporary shortage in Washington appears to offer Beijing an acceptable opportunity.
Original analysis inspired by Gregory J. Moore from The National Interest. Additional research and verification conducted through multiple sources.
