The United States has used more than half of its stockpiles of some weapons systems during the war with Iran, prompting concern about readiness for a future conflict with China. Defense analysts say remaining inventories could support continued operations in Iran under plausible scenarios, but replenishment times are a growing strategic risk. Some new missiles and interceptors may take three to five years to reach the battlefield after funding is approved. The Pentagon and Congress are seeking major increases in weapons production.
| 1) | Current weapons depletion in the Iran war |
| 2) | Why China and the Western Pacific are central concerns |
| 3) | Proposed increases in weapons production |
| 4) | Why replacing the weapons will take years |
| 5) | Industrial expansion and remaining uncertainties |
Current weapons depletion in the Iran war
The United States has used almost one-third of its Tomahawk missiles since the war with Iran began, while nearly two-thirds of Patriot missile interceptors have been depleted. Just over half of the precision strike missile inventory remains. A defense research analysis concluded that the country still has enough missiles to continue fighting Iran under any plausible scenario, but warned that stockpile levels are becoming more important as the conflict continues.
Mark Cancian, a retired U.S. Marines colonel and senior defense adviser, said the immediate issue is not necessarily the ability to continue operations in Iran. The concern is entering another major conflict with fewer available weapons than military planners consider desirable.
“The risk is about a future conflict in the Western Pacific against China,” Cancian said.
Why China and the Western Pacific are central concerns
The systems depleted in Iran would also be valuable in a potential Western Pacific conflict, including a confrontation involving Taiwan. Officials and analysts are examining the war as both a regional operation and a test of U.S. readiness for a larger conflict.
Cancian said declining inventories contributed to suspending some air attacks after stocks fell below levels preferred by war planners. He warned that visible weakness in U.S. munitions supplies could affect China’s assessment of American military capacity. Michael McCaul, a Republican representative from Texas, said Chinese President Xi Jinping was closely watching U.S. stockpiles as Beijing considers possible pressure around the Taiwan Strait.
Proposed increases in weapons production
The Pentagon’s fiscal year 2027 budget request seeks substantial increases for key weapons programs. It includes $5.8 billion for Tomahawk missiles, a 513% increase from the fiscal year 2026 request. Proposed funding is 245% higher for precision strike missiles, 650% higher for Terminal High Altitude Area Defense systems and 927% higher for Patriot Missile Segment Enhancement.
Lawmakers in both parties have supported the proposed spending, arguing that stronger domestic production is essential to national security. Chris Deluzio, a Democratic representative from Pennsylvania, said concern about the defense industrial base could support rebuilding manufacturing capacity. Troy Nehls, a Republican representative from Texas, also backed increased defense spending and said expanded munitions supplies were needed to protect the United States and its partners.
Why replacing the weapons will take years
Approving money does not immediately restore battlefield inventories. Patriot missiles funded through the fiscal year 2027 request are not expected to reach the front line for about three and a half years. Tomahawk delivery could take nearly four years, while some other munitions orders could take as long as five years.
Cameron Tracy, a senior research scholar at the University of California, Berkeley, said interceptors are complex assemblies that take considerable time to produce. Before the war, first deliveries in a new order typically arrived after about two years, with final systems arriving roughly a year later. Wartime demand has extended timelines as contractors secure materials, coordinate subcontractors and expand production.
Industrial expansion and remaining uncertainties
The administration has established framework agreements with contractors to increase capacity for Patriot missiles and other important systems. The arrangements involve new facilities, additional weapons programs and ambitious production schedules. Expanding output requires hiring and training workers, enlarging plants, obtaining permits and strengthening supply chains.
Cancian said production can increase, but warned that industrial expansion takes time. The debate centers on whether proposed funding and contractor agreements can rebuild inventories quickly enough to support current operations while preserving deterrence elsewhere. Donald Trump has said the United States has substantial ammunition supplies, while acknowledging that he would prefer to have more.
| Number | Key Point |
|---|---|
| 1 | Nearly two-thirds of Patriot interceptors and almost one-third of Tomahawk missiles have been used. |
| 2 | Remaining stocks may support the Iran war but could reduce readiness for a conflict with China. |
| 3 | The fiscal year 2027 budget request proposes major increases for several missile programs. |
| 4 | Replacement systems could take three and a half to five years to arrive. |
Summary
The Iran war has exposed the time and industrial capacity required to replace advanced U.S. munitions. Current stocks may support continued operations, but lower inventories could weaken preparedness for a future Western Pacific conflict. Proposed funding increases and production agreements are intended to address the problem, with results depending on how quickly manufacturers expand facilities, workforce and supply chains.
Frequently Asked Questions
How much of some U.S. weapons stockpiles has been used?
Almost one-third of Tomahawk missiles and nearly two-thirds of Patriot missile interceptors have been used since the war with Iran began. Just over half of precision strike missiles remain.
Why does the depletion raise concerns about China?
The same weapons could be important in a Western Pacific conflict, including a crisis involving Taiwan. Lower stocks could limit U.S. readiness for another major war.
How long could replacement weapons take to arrive?
Patriot missiles funded in the fiscal year 2027 request may take about three and a half years to reach the front line. Tomahawks could take nearly four years, and some orders could take up to five years.