The United States will need at least three years to replenish stockpiles of three major weapons systems heavily used during the Iran war, according to a report cited by PBS News. The shortage could limit the US military’s combat readiness in any future conflict with China. The affected systems include Tomahawk cruise missiles, used for deep strikes, and Patriot and THAAD interceptors, which defend against incoming missiles and drones.

The Center for Strategic and International Studies told the Associated Press that while the US has sufficient ammunition for any immediate Iran-related scenario, the depletion has created vulnerabilities in the Western Pacific region. The time required to rebuild these stockpiles has become a major concern for defense planners.

The report also noted that China aims to achieve the military capability to seize Taiwan by 2027 if necessary. Chinese President Xi Jinping recently warned that mismanagement of Washington’s ties with the self-governing island could lead to confrontation or open conflict between the two powers.