The US-led air campaign against Iran has dramatically reduced Iranian missile launches - by roughly 90 percent, according to Gen. David Petraeus. But the retired four-star general warned that a dangerous arithmetic problem is emerging behind the numbers: the balance between how many missiles Iran still has and how many interceptors the US can afford to spend.
Petraeus told CSIS the military has done "very impressive" work destroying missile launchers, stockpiles, and even manufacturing sites, "Hvylya" reports. Yet missiles continue to fly, and "over time there starts to become concern about the missile math - in other words, how many missile launchers and missiles do they have left and how many missile interceptors do we have left."
The cost disparity compounds the problem. Petraeus noted that Patriot and THAAD interceptors cost at least $2 million each, with SM-3s running even higher. Using these systems against cheap drones - which Iran deploys in far greater numbers than conventional missiles - is economically ruinous. He said this calculus "is not a good exchange against a drone that costs at most $30,000."
The general credited the military campaign with major successes across multiple target sets: dismantling Iran's air and missile defenses in a 12-day air war last summer, which then allowed non-stealthy heavy bombers like the B-1 and B-52 to operate alongside stealth aircraft. Strikes have also targeted nuclear infrastructure, regime headquarters, and logistical bases.
But the interceptor math hangs over all of it. Petraeus pointed to Ukraine as a country that had already solved parts of this equation with low-cost drone interceptors and comprehensive layered defenses - lessons the US military has been slow to absorb. The emphasis now, he said, remains on destroying as many Iranian launch capabilities as possible before the stockpile imbalance becomes critical.
Also read: The Pentagon Makes a Grim Admission About Its Defenses Against Iranian Drone Swarms