Iran Uses Low-Cost Drones to Pressure U.S. Air Defenses

Iran is increasingly relying on a strategy that combines large numbers of relatively cheap Shahed-type attack drones with ballistic missiles, creating a serious challenge for U.S. and allied air-defense systems.

The aim may not be to destroy every target using drones. Instead, launching repeated waves can force air-defense crews to detect, track and respond to large numbers of incoming threats. 

This could result in defenders using costly interceptors much faster than Iran spends on the drones themselves.

The challenge becomes even greater when drones are used alongside ballistic missiles. While the slower drones add more targets and complicate the defensive picture, ballistic missiles travel at much higher speeds and require advanced systems such as Patriot and THAAD to intercept them.

The strategy is also raising concerns in the United States. Reuters reported that about 65% of the U.S. Patriot interceptor stock had been used between February and July 2026, leaving fewer than 850 interceptors as production efforts were being accelerated.

The Pentagon has also urged defense companies to increase production quickly amid concerns about reduced supplies of advanced interceptors, including Patriot and THAAD missiles.

Iran's strategy, therefore, may not require it to completely destroy an enemy's air-defense network. Instead, the goal can be to stretch its capacity, overwhelm its systems and gradually drain its stocks.

The result could turn the conflict in the skies into a battle of endurance — low-cost drones on one side and expensive interceptors on the other.