The U.S. military has reportedly depleted nearly all of its inventory of long-range precision surface-to-surface missiles during the five-month conflict with Iran, raising concerns inside the Trump administration about America’s ability to respond to future military crises involving adversaries such as China or Russia.

According to three people familiar with internal military data, the Army has used “virtually all” of its stockpile of Army Tactical Missile Systems (ATACMS) and the newer Precision Strike Missiles (PrSM). The extent of the depletion has not previously been reported.

Both weapons are among the Army’s most important long-range precision munitions, allowing forces to strike distant targets with high accuracy while remaining outside the range of enemy defenses. Each missile costs more than $1 million. ATACMS has also been widely used by Ukraine against Russian targets, while the newer PrSM is gradually replacing the older missile because of its greater range and more advanced capabilities.

The sharp reduction in these weapons could leave President Donald Trump with fewer long-range strike options if the United States launches another major offensive against Iran, potentially increasing reliance on manned aircraft and bombing missions that carry greater risks for American pilots.

The sources declined to disclose exactly how many ATACMS or PrSM missiles remain in the U.S. arsenal.

President Trump launched the military campaign against Iran alongside Israel in February, initially predicting the conflict would be brief. However, as fighting has stretched into its fifth month, officials familiar with the matter have reportedly become increasingly concerned that dwindling missile inventories could weaken America’s deterrence against other global rivals.

A fourth source familiar with the situation said U.S. Central Command had nearly exhausted the land-based missile inventory it possessed at the start of the conflict but has replenished supplies by drawing weapons from stockpiles stationed elsewhere around the world.

All four sources spoke on condition of anonymity because they were not authorized to discuss the classified information publicly.

Asked about the reported stockpile levels, the White House released a statement from President Trump dismissing concerns over America’s military readiness.

The president said the United States possesses “far more munitions than anyone in the world” and “far more than we need.”

“Our defense companies are, at this moment, making more munitions than they have ever made before, in addition to expanding their plants and equipment at record levels,” Trump said.

Defense analysts generally agree that U.S. production of artillery shells and several classes of missiles has reached record levels. However, many caution that manufacturing may still be insufficient to sustain a lengthy, high-intensity conflict.

Lockheed Martin, which manufactures both ATACMS and PrSM missiles as well as the THAAD missile defense system, did not immediately respond to requests for comment. Raytheon, which produces Tomahawk cruise missiles and Patriot missile interceptors, also declined to comment on reported inventory levels.

Pentagon spokesman Sean Parnell rejected suggestions that the military’s readiness has been compromised.

“America’s military is the most powerful in the world and has everything it needs to execute at the time and place of the President’s choosing. We have executed multiple successful operations across combatant commands while ensuring the U.S. military possesses a deep arsenal of capabilities to protect our people and our interests.”

According to the report, internal figures detailing the missile inventories have circulated throughout the federal government over the past week, fueling discussions within the Trump administration about how long military operations against Iran can continue before the shrinking stockpiles begin affecting the nation’s ability to respond to emergencies elsewhere.

One source said the heavy use of ATACMS and PrSM missiles reflected a deliberate strategy by the Trump administration to reduce the risks associated with sending manned aircraft into heavily defended Iranian airspace.

Military experts note that these long-range precision weapons would also play a critical role in any future conflict involving an adversary with sophisticated air defenses, such as China. A March report by the Center for Strategic and International Studies (CSIS) said the missiles have already been used to strike targets inside Iran.

The CSIS report also noted that PrSM inventories were relatively limited even before the war because the missile is still entering service. However, the Army has placed substantial orders for additional missiles scheduled for delivery beginning in 2027, while ATACMS production is being phased out in favor of the newer system.

According to two sources, senior military officials have spent weeks warning President Trump that supplies of defensive weapons—including Patriot missile interceptors used against ballistic missiles—have also fallen significantly. Several media reports last week suggested Trump decided against launching another major attack on Iran after advisers raised concerns about the remaining stockpiles.

A U.S. official disputed that account, saying the president’s decision was instead influenced by pressure from Gulf nations.

The conflict has also renewed debate over President Trump’s authority to conduct sustained military operations against Iran without congressional approval. Congress has not received either a declaration of war or a formal authorization for the use of military force.

Last week, CSIS estimated that approximately 65% of America’s Patriot interceptor inventory had been used between February and July, while the nation’s stockpile of THAAD interceptors had declined by at least 38% since the conflict began. Both systems are designed to intercept and destroy incoming ballistic missiles and are considered among the most advanced missile defense platforms in the U.S. arsenal.

Although Reuters was unable to independently review the classified inventory figures, two sources said the CSIS estimates closely matched internal government assessments.

One source also said the United States has expended just under half of its worldwide inventory of Tomahawk cruise missiles since the start of the war. The sea-launched weapon, fired from Navy destroyers, cruisers, and submarines, has long served as one of America’s primary options for striking heavily defended targets without placing pilots in danger.

As the Pentagon seeks to rebuild its inventories, Raytheon, a subsidiary of RTX, has reached a tentative multi-year agreement with the Defense Department to significantly increase production of Tomahawk missiles alongside several other critical munitions.