The US military has fired almost 80% of its THAAD (Terminal High Altitude Area Defense) interceptors since the war with Iran began, according to multiple reports. This significant depletion of the arsenal has raised alarms among senior commanders who warn that Pentagon munitions reserves are now “dangerously low.”
Prewar estimates placed the US stockpile at roughly 452 THAAD interceptors and about 2,200 Patriot missiles. The recent losses—alongside steep usage of Patriots—are part of why Pentagon officials are expressing concern over readiness and ability to respond to threats from Iran or elsewhere in the region.
## How depleted are the missile defense systems?
– THAAD interceptors are said to be nearly 80% used compared to pre-war levels.
– Patriot missile interceptors have also seen steep depletion—roughly half of those stockpiled pre-war have been expended.
These figures are based on internal military reporting obtained by media outlets like CNN and corroborated by research institutions tracking munitions use and inventory data.
## Ongoing talks with Iran
As the US reels from rapidly draining missile reserves, negotiations with Iran have shown tentative progress. President Donald Trump has described the discussions as “very good,” signaling both parties seem inclined toward a deal. Among the issues being negotiated is reopening the Strait of Hormuz, a strategic maritime chokepoint, potentially via a temporary agreement that regional officials expect may be announced soon.
Despite these overtures, Iranian officials have repeatedly denied that they are involved in any formal agreement yet.
## Pentagon response and political messaging
In the face of reports about falling stockpile levels, Pentagon and White House officials maintain that the US still has “deep” supplies of essential munitions and capabilities. Secretary of Defense Pete Hegseth, speaking publicly, said the military possesses sufficient methods to protect Americans and pursue strategic goals. Meanwhile, White House spokesperson Anna Kelly asserted that the military has “more than enough munitions, ammo, and stockpiles” to satisfy all of President Trump’s strategic aims and beyond.
## Regional concerns and implications
Gulf states, which rely heavily on US air-defense systems for security, are reportedly anxious that lowered US ammunition reserves—especially THAAD and Patriot interceptors—could weaken their defenses.
Additionally, this depletion could force difficult choices in future military operations. Analysts suggest that stockpiles of **long-range precision weapons**, such as ATACMS and the newly deployed Precision Strike Missiles (PrSM), have also been used heavily.
– U.S. officials say **“virtually all”** of ATACMS and PrSM inventories have been used up in the current Iran war.
– Experts observe that more than half the pre-war supply of both THAAD interceptors and Patriot interceptors have been expended in recent operations.
## Supply chain and rebuilding timelines
Restoring depleted munitions stockpiles is far from instant.
– Productions timelines for advanced missile systems typically extend across several years. For example, THAAD interceptors, SM-3 variants, SM-6, and others often require 3–4 years to manufacture.
– The cost per interceptor is steep, with figures like $15 million per THAAD interceptor cited in budgetary estimates.
## Strategic and military readiness risks
Many experts warn that this rate of ammunition drawdown poses near-term risks, especially if the US is drawn into another conflict while its inventory remains low. Some reports suggest that if usage continues as intensely as it has, stocks could be exhausted within roughly a month for certain systems.
## Bottom line
Stockpiles of THAAD and Patriot defensive systems have been significantly drained—THAAD by about 80%, and Patriots by approximately 50%—since the Iran war began. Long-range missile programs such as ATACMS and PrSM have also been nearly exhausted.
Meanwhile, US-Iran talks—including potential interim deals over the Strait of Hormuz—suggest diplomatic avenues are running in parallel with military strain. Though officials insist munitions and defenses remain sufficient, analysts nor defense experts consider the depletion without consequence. Rebuilding full capacity promises to take years, with current usage rates laying bare vulnerabilities should new conflicts arise.
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