17JUN

Iran War Burns Through Pacific Missile Reserves

3 min read

10:21UTC

The US has fired more cruise missiles into Iran in four weeks than it can build in two and a half years. The replacements were earmarked for a China contingency.

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Key takeaway

Pacific deterrence is being spent in Iran faster than production can replace it.

Bloomberg reported on 4 April that the US has fired more than 1,000 JASSM-ER cruise missiles in the first four weeks of Operation Epic Fury. The missiles were drawn from stockpiles previously allocated to Pacific Command for a potential Taiwan contingency.⁠¹

Annual JASSM-ER output stands at 396, expandable to 860 under surge capacity. At 1,000 consumed in 28 days, the Iran war is burning through 2.5 years of planned production each month. Total funded inventory since 2009: just over 6,200. The restock gap runs 18 to 30 months under even the most optimistic surge scenario.

Combined with Arrow-3 interceptors at 81% depletion and THAAD stocks within one month of exhaustion, the US is simultaneously drawing down its primary standoff strike capability and its missile defence inventory. No emergency resupply announcement has been made for any of these systems. The RUSI report that documented 11,294 munitions expended in the campaign's first 16 days at $26 billion now has a sequel: the specific weapon designed for a Taiwan Strait scenario is being consumed at a rate that leaves the Pacific defenceless through at least mid-2028.

Pentagon officials declined to comment. China does not need classified intelligence to calculate what this means. Bloomberg published the numbers.

Deep Analysis

In plain English

The US had a stockpile of advanced cruise missiles that it was keeping in reserve to deter China from invading Taiwan. It has now used more than 1,000 of those missiles in the Iran war in just four weeks. America makes only about 400 of these missiles per year, even at maximum factory effort. Replacing what was used will take at least two years. During those two years, the missiles that were supposed to stop a China attack on Taiwan are not available. China's military planners can read the same news report that Bloomberg published.

Deep Analysis

Root Causes

JASSM-ER is built at a single Lockheed Martin facility in Troy, Alabama. The production bottleneck is tooling and component supply, not labour or willingness. The US decision to deprioritise precision munitions production following the Cold War and to rely on just-in-time inventory assumptions left the industrial base unable to surge beyond 860 units annually on any notice period shorter than 18 months.

The Pacific Command allocation problem is structural: JASSM-ER is the primary weapon for the US Air Force's anti-access/area denial penetration concept in a Taiwan scenario, designed to defeat Chinese S-400 equivalents from beyond their engagement range. No alternative weapon with equivalent standoff range and payload exists in current US inventory, meaning the depletion has no near-term tactical substitute.

What could happen next?

Risk
Pacific deterrence is materially degraded for 18-30 months regardless of how the Iran conflict ends, creating a window Chinese strategic planners can observe and potentially exploit.
Consequence
The $200 billion war supplemental debate in Congress will now include a Pacific industrial base dimension, potentially increasing the final figure and the political complexity.

Source Landscape

This story draws on mixed-leaning sources from Israel

Israel

LeftRight

Primary parallel: UK Tomahawk stock depletion during Libya 2011 — the Royal Navy fired its entire Tomahawk inventory in four months, leaving no standoff strike capability for 18 months and forcing a parliamentary debate on munitions strategy. The US situation differs in scale but follows the same structural pattern: high-value precision weapons consumed faster than industrial capacity to replace them.

Counter-parallel: Ukraine 2022-23 NATO artillery shell depletion — European allies ran short of 155mm shells within months, exposing the same industrial constraint. Unlike Ukraine, the Iran campaign involves weapons with 24-month production cycles, not the 6-month cycles of conventional artillery, making the restocking gap structurally harder to close under any political commitment.

Lockheed Martin's JASSM-ER production line cannot be doubled by purchasing order alone. The $200 billion war supplemental would need to allocate approximately $3-4 billion to Lockheed's Troy facility for tooling, workforce, and component supplier expansion before a single additional missile enters inventory.

The opportunity cost is measurable: each JASSM-ER costs approximately $1.4 million. At 1,000 in four weeks, the Iran campaign consumed $1.4 billion in JASSM-ER value from Pacific-allocated stocks. The same expenditure on Arrow-3 and THAAD replacement would face a different bottleneck: Raytheon's production facilities are in Arizona and Huntsville, Alabama, creating simultaneous surge demands on the Alabama defence industrial base from multiple programmes.

Consensus view: CSIS and RAND analysts Stacie Pettyjohn and Mark Cancian both assessed before the Iran conflict that JASSM-ER stocks were already dangerously thin for a Pacific contingency, with the 2023 National Defense Strategy's stated Pacific priority requiring a stockpile that did not exist at the required scale.

Counter-view: Heritage Foundation defence analysts argue the Iran campaign's JASSM-ER expenditure, though high, demonstrates the weapon's effectiveness in high-density strike environments and that Congress will be compelled to fund accelerated production, ultimately strengthening the industrial base for Pacific deterrence by 2029.

Key tension: Whether the production acceleration required to close the 18-to-30 month gap can be funded and executed before a Taiwan Strait crisis materialises.

First Reported In

Update #59 · Day 37: A Ground War Inside Iran That Nobody Will Name

Jerusalem Post / Bloomberg· 5 Apr 2026

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Causes and effects

Caused by

Arrow-3 stocks hit 81 per cent drain

Arrow-3 at 81% depletion and THAAD within one month of exhaustion form the missile defence context in which the JASSM-ER Pacific stock depletion compounds overall US munitions crisis.

Occurred 4 Apr 2026

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This Event

Iran War Burns Through Pacific Missile Reserves

The JASSM-ER depletion quantifies for the first time the trade-off between the Iran campaign and Pacific deterrence against China.

Led to

Interceptor Crisis Reaches Projected Depletion Window

1,000+ JASSM-ERs consumed from Pacific stocks (ID:1977) compounds the defensive depletion crisis with offensive depletion.

Occurred 6 Apr 2026

Read story →

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