The expenditure of nearly half of the United States’ interceptor missile arsenal during Operation Epic Fury has dominated headlines for weeks, drawing scrutiny over the immense strain placed on the nation’s defense industrial base. Yet defense analysts and military planners are increasingly warning that the most significant cost of the campaign against Iran may not be measured in dollars at all.
Since the combined American and Israeli air, drone, and missile offensive began, a total of 42 aircraft have been destroyed, damaged, or otherwise removed from operational service. Replacing those losses is estimated to cost roughly $7 billion, adding to the approximately $29 billion already spent by expeditionary forces during the conflict.
But even that staggering figure understates the true impact.
Several of the aircraft lost during the operation belong to categories that can no longer be manufactured. Among the most notable losses were an A-10 Thunderbolt II attack aircraft and an E-3 Sentry airborne warning and control system aircraft. Both production lines were shut down decades ago, meaning that no direct replacements can be built regardless of funding.
The destruction of these platforms has transformed what might otherwise be viewed as a procurement challenge into a broader debate about military readiness, force sustainability, and the vulnerability of modern airpower in high-intensity warfare.
The central problem facing the U.S. military is that many of the aircraft lost during Operation Epic Fury cannot simply be reordered from a factory.
For decades, American defense planning relied on the assumption that technological superiority would minimize losses while allowing a relatively small force of advanced aircraft to dominate the battlefield. The campaign over Iran challenged that assumption.
The loss of the A-10 Thunderbolt II illustrates the issue. Though often criticized as a relic of the Cold War, the aircraft remains uniquely capable in close-air-support operations. Its production line closed in 1984, and no direct replacement exists.
While the F-35A Lightning II has been positioned as a future multi-role solution capable of assuming many missions once handled by legacy aircraft, it is neither optimized for the same battlefield role nor available in sufficient numbers to immediately offset attrition.
The situation surrounding the E-3 Sentry is even more severe. Built on the Boeing 707 airframe, which has been out of production for decades, the aircraft serves as one of the most important command-and-control assets in the U.S. inventory. Its massive radar system provides battlefield awareness over hundreds of miles, enabling commanders to coordinate complex air operations.
With one aircraft destroyed during the conflict, the already limited fleet has been reduced further. Only a small number of operational E-3s remain, and no direct successor has yet entered service in meaningful quantities.
Defense officials have long pointed toward the Boeing E-7A Wedgetail as a potential replacement, but acquisition costs and procurement delays have slowed any transition. As a result, the loss of a single E-3 represents far more than its monetary value.
One of the most dramatic episodes of the conflict began when an F-15E Strike Eagle was shot down during a high-risk nuclear interdiction mission deep inside southwestern Iran.
According to operational accounts, the pilot ejected safely and was recovered quickly. The aircraft’s weapon systems officer, however, became stranded in mountainous terrain and remained isolated for several days.
The recovery effort rapidly evolved into one of the largest combat search-and-rescue operations conducted by American forces in recent years.
On the first day of the mission, an A-10 Thunderbolt II providing low-level close-air-support suffered severe damage while operating in hostile territory. The pilot ejected while attempting to return to friendly airspace, resulting in the loss of the aircraft.
As rescue efforts continued, additional drones and support aircraft were committed to locating and extracting the stranded crew member.
The operation culminated on the third day when a force of approximately 155 aircraft participated in a major extraction effort. Although rescue teams successfully recovered the weapon systems officer, severe weather and difficult terrain contributed to the destruction of two MC-130J Commando II special operations transports.
To prevent sensitive electronic warfare systems and advanced terrain-following radar equipment from falling into Iranian hands, U.S. personnel reportedly destroyed both aircraft on the ground before withdrawing.
The rescue succeeded, but at considerable cost.
The F-15E fleet also suffered additional setbacks beyond the combat loss over Iran.
Three Strike Eagles were reportedly lost in a friendly-fire incident over Kuwait after being mistakenly identified as hostile aircraft by local air-defense systems.
The combined loss of four F-15Es presents a significant challenge for the Air Force.
Although Boeing continues to manufacture the newer F-15EX Eagle II, production of the legacy F-15E has ended. Any effort to replenish the fleet would therefore require diverting production slots from the F-15EX program.
Industry analysts estimate that replacement aircraft would not reach operational squadrons for at least three years due to existing production backlogs.
What appears to be a straightforward replacement on paper therefore translates into a prolonged reduction in combat capacity.
While only one F-35A Lightning II was publicly reported damaged during the operation, the incident highlighted broader concerns surrounding the program.
The aircraft was reportedly struck by Iranian anti-aircraft fire while operating in a heavily defended environment and was forced to conduct an emergency landing.
The event marked a significant milestone in military aviation history, representing one of the first known instances in which a fifth-generation stealth fighter sustained combat damage from enemy fire.
Although the aircraft survived, questions remain about how quickly the fleet could absorb larger losses if a future conflict proves more demanding.
The Pentagon has already reduced planned F-35 deliveries amid ongoing difficulties associated with the Technology Refresh Three and Block Four modernization programs. Software validation problems have delayed acceptance of aircraft and contributed to growing backlogs across the production pipeline.
Even when new aircraft are delivered, some have reportedly arrived with limitations that restrict operational use until additional systems are installed.
These challenges underscore a broader concern: modern aircraft may be technologically advanced, but they are also extraordinarily difficult to produce at scale.
Operation Epic Fury also inflicted heavy losses on America’s unmanned fleet.
Twenty-four MQ-9 Reaper drones and one MQ-4C Triton were lost during the campaign.
Although drones are often viewed as expendable compared to crewed aircraft, the financial impact remains substantial. Combined losses approach $1 billion in procurement value.
The MQ-9 presents a particularly troubling case. Despite being far newer than aircraft such as the A-10 or E-3, it is no longer in active production. The platform’s intended successors, including collaborative combat aircraft and so-called “loyal wingman” systems, remain years away from large-scale deployment.
As a result, losses sustained today cannot be rapidly replenished tomorrow.
Military planners have increasingly emphasized drone expansion initiatives, including programs designed to field large numbers of autonomous aircraft. However, production capacity has yet to reach the levels necessary to sustain attrition rates observed during the Iran campaign.
The conflict’s impact extended beyond fighters and drones.
A KC-135 Stratotanker crashed over Iraq, killing all six crew members aboard. Additional tanker aircraft suffered varying degrees of damage, including several struck during Iranian missile and drone attacks against regional air bases.
Support aircraft are often overlooked in discussions of airpower, yet they remain indispensable for sustained operations. Tankers enable long-range missions, while airborne command-and-control platforms coordinate battlefield activity.
Without them, even the most advanced fighter force struggles to function effectively.
Search-and-rescue assets were also affected. An HH-60W Jolly Green II helicopter sustained significant combat damage while inserting pararescue teams during recovery operations.
Meanwhile, unofficial reports suggested that several MH-6 Little Bird helicopters may have been lost alongside the destroyed MC-130Js. Although these losses were not included in official tallies, they contribute to growing concerns about attrition across specialized aviation units.
The aircraft losses sustained during Operation Epic Fury have exposed a fundamental weakness in America’s defense industrial base.
During World War II, American factories routinely replaced combat losses in a matter of days or weeks. Modern military production operates under vastly different conditions.
Advanced aircraft depend on highly specialized electronics, software, sensors, and supply chains that often involve limited numbers of suppliers. Production rates are optimized for peacetime efficiency rather than wartime surge capacity.
As a result, replacing a sophisticated aircraft today can require years rather than months.
Congressional researchers have acknowledged uncertainty regarding how these losses will affect future operational requirements. Questions also remain about whether current production lines can generate replacement aircraft quickly enough to sustain force levels during a prolonged conflict.
For defense planners, those concerns may ultimately matter more than the financial cost.
Perhaps the most significant lesson of Operation Epic Fury is the mismatch between the cost of modern military equipment and the cost of destroying it.
In multiple cases, relatively inexpensive missiles and drones succeeded in damaging or eliminating aircraft worth tens or hundreds of millions of dollars.
The resulting exchange ratio heavily favored the defender.
For years, Western military doctrine assumed that superior technology would offset numerical disadvantages and minimize attrition. The campaign against Iran suggests that assumption may no longer hold in an era defined by dense air-defense networks, long-range missiles, and increasingly capable unmanned systems.
The challenge facing the United States is therefore larger than replacing lost aircraft.
It must determine whether its defense industrial base can sustain modern warfare at all.
Operation Epic Fury demonstrated that the United States still possesses unmatched technological capabilities. It also revealed that technology alone cannot guarantee resilience when replacement timelines stretch into years and production lines struggle to keep pace with battlefield losses.
The aircraft destroyed during the campaign may eventually be replaced. The industrial vulnerabilities they exposed, however, could prove far more difficult to overcome.
