U.S. Epic Fury Shows Patriot and THAAD Air Defense Effectiveness Against Iranian Drones and Missiles.

Operation Epic Fury against Iran saw U.S. and regional air defenses intercept more than 6,000 Iranian one-way attack drones and over 1,500 ballistic missiles targeting U.S. and partner forces, according to the first Lead Inspector General report on the campaign. The scale of the attack demonstrated the combat value of Patriot and THAAD air defense missile systems while exposing how quickly sustained mass salvos can strain even advanced missile defense networks.

Patriot and THAAD provided critical protection against repeated Iranian ballistic missile and drone attacks, but the campaign also highlighted the operational importance of interceptor depth. Any renewed high-intensity confrontation would place renewed pressure on U.S. stockpiles, making magazine capacity and resupply as important as the performance of the air defense systems themselves.

Related Topic: Iran Conflict Accelerates Gulf States Shift Toward a More Integrated U.S. Air Defense Network

A U.S. THAAD interceptor missile is launched during a firing test. Operation Epic Fury against Iran highlighted the combat role of THAAD and Patriot systems after the U.S.-led regional defense network reportedly intercepted more than 1,500 Iranian ballistic missiles and 6,000 one-way attack drones. (Picture source: French MoD)

Published in September 2026, the report covers Operation Epic Fury through June 30 and details how U.S. Central Command reinforced integrated air and missile defenses across the Middle East. Operation Epic Fury began on February 28 as a U.S.-Israeli campaign targeting Iranian nuclear, ballistic missile, naval, and security infrastructure, with USCENTCOM reporting approximately 13,500 targets struck, 36,000 combat sorties, and more than 1,800 fire missions during the main combat phase through April 7.

At the height of the operation, U.S. forces included more than a dozen air defense batteries, including THAAD air defense units, while additional air defense and counter-unmanned aircraft teams were distributed across regional bases. Patriot batteries provided terminal defense against ballistic missiles and other aerial threats, THAAD extended ballistic missile interception to higher-altitude engagements, and Israel's Arrow, David's Sling and Iron Dome systems added complementary defensive layers. U.S. personnel embedded in partner air operations centers supported shared warning, engagement coordination and deconfliction across the regional network.

The most important lesson from the campaign may be less about whether Patriot or THAAD can defeat Iranian ballistic missiles than about how long those defenses can continue firing. The Lead Inspector General report states that Operation Epic Fury generated strategic munitions inventory shortfalls and exposed industrial bottlenecks, with the Department of War estimating that $22.3 billion worth of munitions had been expended by late June. Solid rocket motors, high-grade explosives, propellants, and skilled manufacturing labor were identified among the persistent constraints limiting how quickly U.S. weapons inventories can be replenished.

That shortage becomes particularly important during missile defense saturation attacks. Modern ballistic missile defense depends on maintaining enough ready interceptors to defeat repeated salvos rather than a single attack, and commanders may need to allocate more than one defensive missile against high-priority incoming threats depending on engagement conditions. The Lead Inspector General report does not disclose how many Patriot, THAAD, Arrow, David's Sling or Iron Dome interceptors were actually fired, meaning the more than 7,500 reported interceptions cannot be translated directly into an equivalent number of interceptor missiles consumed.

The operational challenge is amplified by the growing use of mixed ballistic missile and drone attacks in current conflicts. Ballistic missiles can strike air bases, headquarters, logistics centers, and other fixed targets at high speed with limited warning, while one-way attack drones provide a less costly way to generate additional incoming tracks, forcing defenders to divide radar attention and consume defensive resources. When these weapons arrive in coordinated waves, the problem becomes one of magazine depth, sensor capacity, and engagement management as much as individual interceptor performance.

Iran is well positioned to create that kind of pressure because it developed its missile force around dispersion, mobility, and survivability. The Lead Inspector General report notes that Iran spent decades expanding its domestic defense industry while protecting military capabilities through underground facilities, dispersed ammunition storage, concealment, deception, and mobile missile launchers. These measures allow portions of the force to survive offensive strikes and preserve the ability to resume attacks after known bases, launch areas, or production facilities have been hit.

Iran's underground missile cities are an important part of this survivability strategy. Iranian authorities have repeatedly displayed extensive tunnel networks containing ballistic missiles, transporter-erector-launchers and associated equipment, while several hardened complexes are understood to support missile storage, assembly, testing or production. Major missile-industrial areas such as Khojir and Shahroud form part of a wider, geographically dispersed structure intended to make the Iranian missile force harder to eliminate through conventional air strikes.

These facilities matter because destroying visible factories does not necessarily destroy missiles, components, or production equipment protected underground. Tunnel networks can preserve assembled weapons, launch vehicles, guidance components, and manufacturing equipment, while mobile missile units can disperse away from permanent bases before an attack. Thousands of strikes can therefore substantially degrade Iran's missile force without guaranteeing its complete suppression, particularly when intelligence cannot continuously locate every launcher, storage site, and underground production area.

Available open-source information indicates that Iranian missile forces were heavily degraded, but not destroyed, and that some assembly and production activity has continued or resumed at underground facilities. Precise postwar missile inventories remain uncertain, and Iranian claims should be treated cautiously, but surviving launchers, stored missiles, and hardened production infrastructure mean Tehran can regenerate at least part of its missile force.

Despite more than 7,500 reported interceptions, Iranian attacks still inflicted substantial damage. USCENTCOM reported that hundreds of buildings and structures at U.S. bases in Kuwait, Bahrain, Qatar, the United Arab Emirates, Saudi Arabia, Iraq, Oman and Jordan were damaged or destroyed during the conflict. This demonstrates the limits of even a dense layered air and missile defense network when attacks are geographically dispersed and sustained over time.

The Lead Inspector General report does not provide a system-by-system accounting of Patriot, THAAD, Arrow, David's Sling, or Iron Dome interceptor expenditures, meaning the more than 7,500 interceptions cannot be translated directly into an equivalent number of missile shots. Some unmanned aerial threats can be defeated by combat aircraft, electronic warfare, guns, or dedicated counter-UAS systems, while ballistic missile engagements can require multiple interceptors depending on doctrine, trajectory, and the importance of the defended target.

The broader industrial challenge is nevertheless clear. The Pentagon's June supplemental request included approximately $21 billion for munitions, while subsequent procurement actions have focused on accelerating PAC-3 MSE and THAAD output. Yet production lead times remain measured in years rather than months, meaning another large Iran missile attack in the near term would test existing inventories before the planned expansion of U.S. interceptor manufacturing reaches full output.

Regional procurement is moving in the same direction. The Lead Inspector General report lists major U.S. arms-sale notifications involving PAC-3 Missile Segment Enhancement interceptors for Saudi Arabia, Patriot replenishment for Qatar, air and missile defense radars and Integrated Battle Command System equipment for Kuwait, and a Long Range Discrimination Radar with THAAD integration for the United Arab Emirates. These acquisitions show that regional partners are increasingly focused not only on buying launchers and radars but also on building sufficient interceptor depth for repeated attacks.

Operation Epic Fury therefore provides one of the clearest recent examples of both THAAD combat performance and the growing risk of U.S. interceptor shortage. Patriot, THAAD and Israeli missile defenses helped defeat thousands of Iranian ballistic missiles and drones, but the campaign simultaneously consumed a large share of available stocks and exposed production bottlenecks that cannot be solved quickly.

The central issue for any renewed confrontation is therefore not whether Patriot and THAAD can intercept Iranian missiles. They have demonstrated that capability. The question is how long they can continue doing so under repeated mass salvos. Iran's surviving mobile launchers, underground missile cities and hardened production network preserve its ability to regenerate offensive pressure, while U.S. and allied defenses remain constrained by interceptor inventories and industrial replacement rates.

In a prolonged missile war, the decisive factor may increasingly be which side can replenish faster: Iran rebuilding ballistic missile stocks and restoring underground production, or the United States and its partners rebuilding the Patriot and THAAD interceptors required to stop them. That makes missile-defense endurance, industrial production, and stockpile depth just as important as the interceptor's technical performance.

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Written by Alain Servaes – Chief Editor, Army Recognition Group
Alain Servaes is a former infantry non-commissioned officer and the founder of Army Recognition. With over 20 years in defense journalism, he provides expert analysis on military equipment, NATO operations, and the global defense industry.