The U.S. Army has used up much of its global stockpile of highly accurate long-range missiles during its five-month war with Iran, ​according to three people familiar with the data, raising concerns about the military's readiness for future conflicts.

The missiles are principally the Army's surface-to-surface weapons, known as Army Tactical Missile Systems (ATACMS) and Precision Strike Missiles (PrSM). The U.S. ‌has used "virtually all" of these weapons, according to two of the sources.