US Interceptors Face Strain as Iran Unleashes Missile Barrages
United States military forces have successfully intercepted hundreds of Iranian ballistic missiles in recent days, as Tehran retaliated against joint American and Israeli strikes with extensive barrages across the Middle East region. According to General Dan Caine, Washington has "intercepted hundreds of ballistic missiles targeting US forces, our partners and regional stability".
The High Cost of Missile Defence
Each successful interception, however, carries a significant financial and logistical burden. Advanced missile defence systems depend on sophisticated interceptors that are expensive, complex to manufacture, and available only in limited quantities. Military analysts caution that if Iran maintains its current rate of missile fire, the pressure on US and allied stockpiles could escalate rapidly.
Kelly Grieco of the Stimson Center informed news agency AFP that there is "a risk the United States and its partners could run out of interceptors before Iran runs out of missiles", though she noted this outcome remains uncertain. She emphasized that the conflict involves not only shooting down incoming threats but also destroying Iranian launchers to reduce the overall threat.
A Race Between Launchers and Defences
At the conflict's onset, Israeli intelligence estimated Iran possessed approximately 2,500 ballistic missiles—potentially exceeding the combined interceptor inventories of the US and Israel. In response, both nations have conducted air strikes on missile storage facilities and launch sites to diminish this arsenal.
President Donald Trump has suggested the campaign might last four to five weeks, asserting that US forces are "substantially ahead" of projected timelines. Defence Secretary Pete Hegseth has provided varying estimates, highlighting the uncertainty surrounding the war's duration.
The longer the conflict persists, the more critical supply issues become. Grieco points out that interceptor production "simply cannot keep pace with demand", especially as multiple global theatres, from Europe to the Indo-Pacific, require the same defence systems.
Joe Costa of the Atlantic Council has warned that a prolonged confrontation with Iran could deplete stocks needed for other potential crises, including those involving China.
Scale Versus Sophistication in Military Capabilities
The ongoing exchanges underscore the differing military approaches of Iran and Israel. The 2026 Global Firepower Index ranks Israel 15th globally and Iran 16th, indicating broadly comparable overall capabilities despite distinct strengths.
Iran's advantage lies in its sheer scale. With a population of around 88 million and hundreds of thousands of active personnel, it maintains one of the region's largest ballistic missile arsenals. Estimates suggest Tehran may hold over 3,000 missiles, including short- and medium-range systems.
In contrast, Israel relies heavily on technological sophistication and layered missile defence. Systems such as Iron Dome, David’s Sling, and Arrow are designed to counter threats at various ranges, creating a shield against massed attacks. The United States supplements this architecture with its own high-end interceptors deployed across Gulf bases.
Yet even the most advanced defences have limitations. Iran has also invested significantly in drones, which are cheaper to produce and can force defenders to expend interceptors. While drones typically require fewer high-end systems to defeat, they contribute to the overall strain on defence resources.
Strategic Consequences and Endurance Challenges
The strategic risk is not necessarily an immediate exhaustion of US defences, but that sustained high-intensity exchanges could deplete inventories faster than they can be replenished. Interceptors require time to manufacture, and supply chains are already stretched thin.
If US and Israeli forces can rapidly degrade Iran's launch capacity, the pressure may ease. Otherwise, missile exchanges could dictate the war's tempo and test the resilience of Western defence industries.
In this context, the conflict is evolving into not just a battle of firepower, but of endurance: a race between Iran's missile reserves and America's ability to sustain its defensive shield over an extended period.
