Just days into the escalating Iran-US conflict, the battlefield has shifted toward a war of endurance. Iran is deploying waves of low-cost Shahed-136 drones and rudimentary cruise missiles to strain US and Gulf air-defense systems — creating a costly imbalance that could determine the war’s trajectory.
Since the weekend airstrikes by the United States and Israel targeting Iranian military infrastructure, Tehran has retaliated with sustained drone and missile attacks across the Middle East. US bases, oil facilities, and civilian infrastructure from Bahrain to the United Arab Emirates have come under repeated fire.
The Cost Imbalance Problem
At the heart of the confrontation lies a stark financial contrast. Iranian Shahed-136 drones are estimated to cost around $20,000 each, while US-made Patriot PAC-3 interceptor missiles cost roughly $4 million per unit.
Though Patriot systems have reportedly achieved interception rates above 90%, according to Gulf officials, the economics of the exchange are troubling for Western planners. Expensive interceptors are being used to neutralize relatively cheap drones — a dynamic that military analysts warn could quickly deplete defensive stockpiles.
This strategy echoes lessons from the Ukraine war, where inexpensive drones and loitering munitions forced defenders to burn through high-end missile inventories at unsustainable rates.
Attrition as Strategy
Defense experts suggest Iran’s approach is deliberate.
Kelly Grieco of the Stimson Center describes the strategy as operationally logical from Tehran’s perspective. By launching persistent waves of low-cost drones, Iran may be aiming to exhaust US and Gulf interceptor supplies and erode political support for prolonged military engagement.
Internal assessments reportedly indicate that Qatar’s Patriot missile stockpiles could last only a few days at the current interception rate. Similar pressures are being felt across the region.
Iran is believed to have possessed around 2,000 ballistic missiles following previous hostilities with Israel. However, it likely maintains a far larger stock of Shahed drones — systems that are cheaper, easier to produce, and operationally flexible. Analysts estimate that Iran has already launched over 1,200 projectiles since the beginning of the conflict this year, many of them drones.
There are indications that Tehran may be conserving its more advanced ballistic missiles for potential escalation later in the conflict.
Strain on US Munitions
On the American side, questions are emerging about sustainability. Lockheed Martin reportedly produced about 600 PAC-3 interceptors in 2025. Given the volume of reported interceptions, thousands of defensive missiles may already have been fired in recent days across the region.
Saudi Arabia and the UAE also operate THAAD systems, which are even more expensive — around $12 million per interceptor — and designed primarily for advanced ballistic threats rather than drones.
US forces have supplemented missile defenses with fighter jet patrols armed with Advanced Precision Kill Weapon System (APKWS) rockets, costing approximately $20,000 to $30,000 each. However, the operational costs of continuous air patrols add another layer of expense.
Iran’s Defensive Weakness
While Iran is exerting pressure offensively, its own air-defense capabilities appear significantly weakened. Early US and Israeli strikes reportedly damaged Iran’s Russian-made S-300 surface-to-air missile systems, leaving its airspace vulnerable. Since then, allied aircraft have operated over Iranian territory without major resistance.
Despite that vulnerability, Tehran’s strategy may not depend on air superiority but rather on endurance — betting that it can outlast its adversaries in a prolonged exchange.
A War of Stockpiles
The defining question now is not who has superior technology, but who can sustain the fight longer.
If Iranian strikes continue at current intensity, interceptor stockpiles in the Gulf could become dangerously low within days. Conversely, if Iran’s drone and missile inventories begin to dwindle, the conflict could shift toward stalemate.
Analysts suggest that in the short term, Iran’s regime could survive internal chaos while forcing its opponents into difficult cost-benefit calculations.
The conflict has thus evolved into a test of logistics, industrial capacity, and political will — a modern war defined less by battlefield breakthroughs and more by the mathematics of munitions.
Originally published on 24×7-news.com.
