The US military has used up nearly 80% of its THAAD interceptors and roughly half of its Patriot stock during the five-month war with Iran, according to two sources familiar with the latest Pentagon inventory report, CNN reported.
Senior US military commanders are warning the Pentagon's munitions stockpile is "dangerously low," according to multiple sources familiar with the matter. The disclosure on THAAD levels has not been previously reported. Before the war began, the US had around 2,200 Patriot interceptors of the platform's two most modern variants and 452 THAAD missiles, according to Center for Strategic and International Studies (CSIS) estimates. CSIS has assessed the war with Iran drained over half the global Patriot stockpile within its first 39 days.
The Patriot and THAAD systems are the same interceptor families that arm Ukraine's own air defense against Russian ballistic strikes - Kyiv depends on to stop Russian ballistic missiles. Thus a stockpile "dangerously low" for Washington is one that's already left Ukrainian Patriot launchers running empty during Russian barrages.
Commanders call stockpiles dangerously low
The US Army has fired "virtually all" of its long-range, surface-to-air precision weapons during the war, one source told CNN, referring to Army Tactical Missile Systems (ATACMS) and Precision Strike Missiles (PrSM). Close to half of the US Tomahawk cruise missile stockpile has also been used, a source said, up from nearly 30% reported by CNN in April.
Gulf allies have raised concerns that the shortage could limit their own ability to intercept Iranian retaliation, particularly if Washington resumes strikes. Replenishment is slow: the Pentagon is currently receiving about 15 new Tomahawks and 20 new Patriot missiles a month, and CSIS estimates rebuilding THAAD stocks to prewar levels will take three years or more.
Weekend strikes called off over stockpile concerns
The munitions warnings, combined with intelligence on the risks of striking Iranian energy infrastructure and concerns raised by Gulf states, were factors in President Donald Trump's decision to call off planned strikes over the weekend, according to CNN's sources. Trump had authorized the operation Friday, with Defense Secretary Pete Hegseth receiving the final order to proceed, a senior Trump official said. Trump reversed course Saturday after Middle East allies told him they feared Iranian retaliation against their energy infrastructure, the official said. He told Hegseth to stand down for now but has not ruled out strikes at a later date.
Pentagon spokesman Sean Parnell said in a statement that the US military "has everything it needs to execute at the time and place of the President's choosing." White House spokesperson Anna Kelly said the military has "more than enough munitions, ammo, and stockpiles to serve all of President Trump's strategic goals and beyond."
Joint Chiefs Chairman Gen. Dan Caine raised the stockpile issue in a separate White House meeting last month, CNN previously reported, where officials also discussed the risk of mass civilian casualties from a resumed US campaign inside Iran.
The shortage extends beyond Iran
CNN's sources said the depleted stockpile could affect the US military's ability to fight a future war involving China, Russia, or North Korea. "The lack of interceptors means that conventional attacks can backfire if the suicide drones start making it through in-masse," one source said. "Tit-for-tat will never end this."
Euromaidan Press has reported that the same Patriot shortage has already strained deliveries to Ukraine, which depends on PAC-3 interceptors as its only defense against Russian ballistic missiles. A senior Ukrainian official has told the Financial Times that deliveries to Kyiv faced delays since the war with Iran began, and President Volodymyr Zelenskyy has said late arrivals have left Patriot launchers empty during Russian missile barrages.
Analysts expect a slow recovery. The Precision Strike Missile and Joint Air-to-Surface Standoff Missile inventories should return to prewar levels by mid-to-late 2027, according to CSIS. The Defense Department has signed two deals this week to expand Patriot and THAAD rocket motor production, though a Pentagon spokesperson declined to say when the expansion would show results.
Trump on Monday called Iranian leadership "unbelievably duplicitous" after Tehran denied that negotiations would resume, and said Tehran had one "last chance" to sign a deal.
