A recent analysis by the Center for Strategic and International Studies (CSIS) indicates that the US military will require at least three years to replenish its stockpiles of crucial weapons systems heavily utilized during the Iran War. These systems include Tomahawk cruise missiles, Patriot interceptors, and THAAD interceptors. This depletion has created a "window of vulnerability" for potential conflicts, especially in the Western Pacific, even though current munitions are sufficient for any plausible scenario in the Iran War.
During the full-scale fighting with Iran, which concluded in April, the Pentagon expended significant portions of its missile inventory. According to CSIS and confirmed by sources familiar with Defense Department estimates, at least half of the THAAD ballistic missile interceptors, nearly half of the Patriot air defense interceptors, and approximately 30% of Tomahawk land-attack missiles were used. The ceasefire offered a temporary reprieve, as subsequent low-intensity strikes required fewer missiles.
The cost of these munitions is substantial, with Tomahawk missiles costing about $2.6 million each, Patriot interceptors around $4 million each, and THAAD missiles also approximately $4 million each. The sheer volume used is staggering: over 1,000 Tomahawks, up to 1,430 Patriots from a pre-war stock of 2,330, and between 190 and 290 THAAD interceptors from a pre-war stock of 360. Experts like Mark Cancian of CSIS note that it can take one to five years to produce a single missile, meaning current production fulfills orders from years ago and new funding won't yield missiles for several years.
This depletion has prompted calls for additional funding, with the Pentagon requesting another $87 billion to address "critical shortfalls." The issue is not primarily financial, but rather the significant time required to expand production capacity for these complex systems. The US official also stated that both Patriot and THAAD stockpiles are "extremely low." This situation poses a challenge for President Trump as he considers future military engagements, as the country faces a prolonged period of vulnerability in its critical defense capabilities.
