For more than forty years, Iran quietly built one of the most extensive underground military infrastructures in the world.
Hidden beneath mountains and reinforced rock layers, these facilities—often referred to as “missile cities”—were designed to ensure that the country could launch retaliatory strikes even after suffering heavy attacks.
But recent military operations targeting those installations have raised serious questions about the survivability of that strategy.
Satellite imagery, defense analysis, and early battlefield reports suggest that several of these underground complexes may have been partially sealed during precision strikes aimed not at destroying the facilities themselves, but at cutting them off from the surface.
The implications could be significant—not only for Iran’s military capabilities, but also for the personnel stationed inside the tunnels.
Iran’s underground missile program dates back to the 1980s.
During the Iran-Iraq War, military planners began constructing hardened storage sites to protect missiles from aerial bombardment.
Over the following decades, the project expanded dramatically.
The Islamic Revolutionary Guard Corps (IRGC) developed a sprawling network of underground bases across the country.
These facilities included extensive tunnel systems, power infrastructure, communication networks, and internal transport systems capable of moving large ballistic missiles through underground corridors.
In publicly released footage over the years, Iranian state media showed military leaders touring massive caverns lined with missiles and mobile launch vehicles.
Rows of systems such as Shahab, Sejjil, and other long-range weapons were displayed in long tunnels carved deep into mountains.
The message behind those images was clear: Iran believed its strategic arsenal was protected from conventional military attacks.
While the facilities themselves were extremely difficult to destroy, military analysts long pointed out a structural weakness in their design.
Underground missile complexes depend heavily on a limited number of surface connections—tunnel entrances, ventilation shafts, and logistical access routes.
These entry points serve as the lifeline between the underground infrastructure and the outside world.
Missiles stored underground cannot be launched directly from within most of these facilities.
Instead, they must be transported through tunnels, moved to launch positions, and deployed on the surface.
That process requires open, functioning exits.
If those exits are blocked or destroyed, the entire system can become effectively useless—regardless of how many missiles remain intact underground.
Recent strikes appear to have focused precisely on that vulnerability.
Instead of attempting to destroy the deeply buried facilities themselves—an extremely difficult task even with advanced bunker-penetrating weapons—attacking forces reportedly targeted the entrances and ventilation systems connected to several major tunnel networks.
Satellite images taken after the attacks show signs of collapsed tunnel portals, structural damage near entrances, and debris covering access points at multiple locations.
From a strategic perspective, this type of operation is less about destroying weapons and more about isolating them.
A missile arsenal that cannot be accessed, moved, or launched becomes effectively neutralized during a conflict.
While the military implications are clear, another aspect of the situation has drawn increasing attention: the fate of personnel stationed inside these complexes.
Underground missile bases are not automated storage sites.
They require staff for maintenance, communications, security, and operational readiness.
If tunnel entrances or ventilation shafts are heavily damaged, those inside could face severe challenges.
Ventilation systems are particularly critical in underground facilities.
Without a continuous flow of fresh air, enclosed spaces can become hazardous over time.
Power failures and communication disruptions could further complicate any effort to coordinate rescue or evacuation.
However, the exact number of personnel affected remains uncertain.
Some reports have suggested that individuals may have been trapped inside certain facilities, but such claims have not been independently verified.
In many cases, military installations include emergency escape routes and backup systems designed to prevent such scenarios.
Another concern frequently mentioned by analysts involves the storage of large quantities of volatile missile components.
Ballistic missiles rely on energetic propellants and complex fuel systems.
When stored in large numbers within confined underground spaces, they present potential safety risks—particularly if ventilation or temperature control systems are compromised.
Defense specialists have long warned that a breach in such facilities could trigger secondary explosions if munitions are stored without sufficient separation.
Whether any such events have occurred remains unclear, but the possibility highlights the inherent danger of maintaining large missile stockpiles in enclosed underground environments.
In the days following the strikes, observers noted a significant reduction in the pace of missile launches attributed to Iranian forces.
Military analysts caution that such a decline could have multiple explanations.
It might reflect damage to launch infrastructure, the loss of operational launchers, disruptions in command and control, or simply a strategic decision to conserve remaining resources.
Nevertheless, the apparent drop in launch activity has reinforced the argument that targeting access points rather than deeply buried structures can have major operational effects.
For decades, Iran’s underground missile network was viewed as a cornerstone of its deterrence strategy.
By placing key weapons deep beneath mountains, the country sought to guarantee that at least part of its arsenal would survive any first strike.
Recent events suggest that survival alone may not be enough.
Missiles hidden underground are only useful if they can reach the surface and be launched.
If the infrastructure connecting those weapons to the outside world is compromised, the strategic value of the arsenal may be significantly reduced.
This realization could shape how military planners across the world think about underground fortifications in the future.
Depth can provide protection—but as recent developments suggest, the entrances may matter far more than the tunnels themselves.
