22SEP

Arrow-3 stocks hit 81 per cent drain

2 min read

10:47UTC

RUSI data shows the missile shield protecting Israel and the UAE will be materially degraded by mid-April. Rebuilding takes years.

← Back to Germany's AI champion merges into Cohere Jump to analysis ↓

TechnologyDeveloping

Key takeaway

Iran does not need to win the air war; it needs to outlast the interceptors.

RUSI's "Command of the Reload" report documented 11,294 munitions expended in the campaign's first 16 days at an estimated cost of $26 billion. Arrow-3 interceptors are at 81% depletion by end of March. THAAD stocks are "approximately one month or less" from exhaustion at current expenditure rates . ¹

Replenishment is not a logistics problem; it is an industrial one. A single Arrow-3 interceptor costs $2 to $3 million and takes months to produce. Full stock rebuild: two to three years. The missile defence architecture protecting Israel, the UAE, and US forces will be materially degraded by mid-to-late April.

Deep Analysis

In plain English

The US and Israel have been intercepting Iranian missiles and drones using expensive specialist rockets called interceptors. Each intercept uses one up. RUSI, a respected defence think tank, calculated that Israel's best interceptors are 81% exhausted. The US's top-tier system, THAAD, is roughly one month from running out. Each interceptor costs $2-3 million and takes months to produce. Rebuilding the full stock takes 2-3 years. Iran does not need to win the air war; it just needs to keep firing until the defensive rockets run out.

What could happen next?

Risk
Arrow-3 exhaustion in mid-April degrades Israeli protection against Iran's long-range ballistic missiles at the moment THAAD is also near exhaustion.
Consequence
Interceptor depletion creates a forcing function for all other deadlines: the 6 April grid deadline, the Kharg timeline, and the War Powers clock all operate inside a window shaped by shield degradation.

Source Landscape

This story draws on neutral-leaning sources

Primary parallel: The Soviet attritional strategy in Afghanistan (1979-89) succeeded not by defeating the Mujahideen militarily but by exhausting the adversary's will and resources. Iran's missile-drone strategy applies the same logic to defensive munitions rather than offensive will: exhaust the interceptors, then strike through the degraded shield.

Counter-parallel: The 1973 Yom Kippur War's early days saw Israeli munitions near depletion before a US emergency resupply reversed the trajectory. No comparable resupply mechanism exists for Arrow-3 or THAAD interceptors at the scale and speed required here.

A single Arrow-3 interceptor costs $2-3 million and takes months to build. Full Arrow-3 stock rebuild: 2-3 years at current production rates. THAAD annual production is approximately 48 interceptors; the entire global THAAD arsenal was 25% depleted in the first eight days .

The $26 billion estimated 16-day campaign cost reflects this asymmetry: Iran fires Shaheds at $20,000-50,000 each; the US intercepts with THAAD and Arrow-3 at $2-3 million each. Iran sustains the exchange rate indefinitely with Russian industrial supply; the US cannot.

Consensus view: RUSI's 'Command of the Reload' report documented the attritional dynamic that multiple US defence analysts had flagged since early March . The Center for Strategic and International Studies estimated the first 100 hours of operation at $3.7 billion, with munitions costs dominating. The production-versus-consumption gap is structural: Lockheed Martin produces approximately 48 THAAD interceptors per year.

Counter-view: US officials have suggested emergency production surge authority could accelerate output. Israel's NIS 2.6 billion emergency procurement indicates awareness of the depletion problem and efforts to address it before exhaustion.

Key tension: Production surge takes months to yield interceptors. The shield degrades in weeks. The gap between production timescale and depletion timescale is the strategic asymmetry Iran is exploiting.

Sources:Pentagon / The Intercept / Novara Media

Mentions:RUSI →Afghanistan →Center for Strategic and International Studies →Iran →Yom Kippur War →Lockheed Martin →Israel →Prima →Arrow-3 →THAAD →

First Reported In

Update #58 · First US aircraft fall over Iran

Pentagon / The Intercept / Novara Media· 4 Apr 2026

Read original →

Causes and effects

Caused by

UAE Stops 2,469 Missiles and Drones

The sustained intercept rate consuming Arrow-3 and THAAD stocks is the underlying cause of the depletion crisis RUSI documented.

Occurred 1 Apr 2026

Read story →

This Event

Arrow-3 stocks hit 81 per cent drain

Interceptor depletion is the hidden clock governing every other deadline in this conflict.

Led to

Iran War Burns Through Pacific Missile Reserves

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

Read story →

Interceptor Crisis Reaches Projected Depletion Window

Arrow-3 at 81% depletion and THAAD one month from exhaustion (ID:1935) projected thresholds now appear to have been reached.

Occurred 6 Apr 2026

Read story →

Different Perspectives

ESMC (TSMC-majority joint venture)

ESMC's president said construction remains on schedule after the Dresden fab's topping-out ceremony on 14 September, reported by Focus Taiwan with first process equipment still targeted for the second half of 2027. No first-party ESMC or TSMC statement independently confirms the claim, and the fab remains 70% TSMC-owned inside a project Europe cites as its semiconductor sovereignty case.

Civo

Civo sold out its Navigate London sovereignty conference on 22 September, drawing about 800 attendees including a sitting MP, a former defence procurement minister and sponsors led by Nokia. Companies House confirms chief executive Mark Boost as Civo's sole person with significant control, British and UK-resident, which answers the ownership question the conference itself is arguing matters.

United States Trade Representative

USTR opened its 2027 National Trade Estimate comment window on 14 September, naming the EU among markets with restrictive technology requirements and inviting submissions on cross-border data rules. The window follows Trump's 24 July Section 301 order into EU digital rules by seven weeks, and unused comments are kept, in USTR's own wording, for future negotiations.

Cohere

Cohere published the deal on 16 September without naming a regulator, running the merged company globally under its own brand from dual Toronto and Berlin headquarters. It pledges the combined company will deliver sovereign AI on STACKIT, the Schwarz Group's German platform, aimed at government buyers weighing that offer against Berlin's own anchor-customer signal.

Germany (Federal Government)

Digital Minister Karsten Wildberger called the Cohere talks "a very strong signal" and signalled Berlin's readiness to become an anchor customer, now its main lever since equity sits with Cohere. The German side secured a co-headquarters and two Cohere C-suite seats, but the protective-rights terms it pressed for in July remain undisclosed.

Poland

Poland leads a self-announced AI Gigafactory consortium with a EUR 100 million phase-one commitment, matched by Czechia and joined by Hungary at EUR 25 million. EuroHPC has confirmed no consortium for the call closing 12 November, so the bloc exists only in national announcements so far.