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Defence & Security8 Nov 2026 · about 6 min

Iran’s IRGC says building underground sites for weapons production, storage

The brief

An underground military complex is a protected facility built below ground for military work. Iran says its complexes will support weapons production and storage. Their importance is survival: underground sites are harder to damage than exposed factories and warehouses during bombardment. The IRGC described an “underground missile city” that is scheduled to be unveiled. It also said missile and drone production lines had been rapidly moved from the surface into underground facilities. The reported network is therefore more than a storage bunker. It is intended to function as a hidden production system. The article does not give the complex’s size, location, or exact construction details. It presents the project as part of Iran’s effort to preserve missile and drone output despite attacks. That could allow Tehran to maintain military pressure and deterrence even when opponents believe its visible stockpiles or factories have been damaged.

01

What is an underground military complex, and what does Iran mean by an “underground missile city”?

An underground military complex is a protected facility built below ground for military work. Iran says its complexes will support weapons production and storage. Their importance is survival: underground sites are harder to damage than exposed factories and warehouses during bombardment.

The IRGC described an “underground missile city” that is scheduled to be unveiled. It also said missile and drone production lines had been rapidly moved from the surface into underground facilities. The reported network is therefore more than a storage bunker. It is intended to function as a hidden production system.

The article does not give the complex’s size, location, or exact construction details. It presents the project as part of Iran’s effort to preserve missile and drone output despite attacks. That could allow Tehran to maintain military pressure and deterrence even when opponents believe its visible stockpiles or factories have been damaged.

02

What weapons and production activities does the IRGC say Iran has moved from the surface into underground facilities?

The IRGC says Iran transferred production lines for missiles and drones from surface locations into underground facilities. It also describes underground sites as places for weapons storage. This means the move concerns both making weapons and protecting supplies already produced.

IRGC spokesperson Hossein Mohebbi said the transfer happened rapidly. He argued that Iran could keep producing missiles while adversaries assumed its stockpiles were shrinking. The article also says Iran’s Aerospace Force manufactures its weapons using homegrown knowledge and expertise.

The article does not list every weapon model or identify each facility. It does report that the planned “underground missile city” is among the announced achievements. The move signals an effort to reduce reliance on exposed production lines and make Iran’s missile and drone program more difficult to disrupt during renewed fighting.

03

How can underground facilities help Iran continue producing and storing weapons during heavy bombardment?

Underground facilities can protect production lines and stored weapons from attacks that damage surface buildings. Their value is continuity. Even if bombardment hits visible military sites, protected underground operations may remain available for manufacturing, maintenance, and storage.

The IRGC says Iran rapidly moved missile and drone production lines below ground. Spokesperson Hossein Mohebbi said this enabled production to continue while adversaries believed Iran’s stockpiles were dwindling. The article also says Iran’s underground military complexes are intended to sustain weapons production and storage under heavy bombardment.

The article does not establish how many facilities exist or how much damage they could withstand. It does show the strategic effect Iran is seeking: preserve output, conceal remaining capacity, and complicate an opponent’s assessment. If fighting resumes, underground production could make strikes less likely to end Iran’s ability to replenish weapons.

04

How large is the reported impact of Iran’s attacks on Gulf infrastructure and US bases?

The reported impact was measured in billions of dollars. The Wall Street Journal reported that Iran caused billions of dollars in damage to US bases across the Middle East during previous rounds of fighting. The figures describe major economic and military consequences.

A separate Reuters report found that Iran successfully targeted Gulf infrastructure on at least 135 occasions during the same period. Those attacks caused billions of dollars in damage and lost revenues, according to the article. Gulf infrastructure is not described in further detail there.

These reports frame the conflict as more than an exchange of battlefield strikes. Damage to bases can impose large repair costs, while attacks on infrastructure can interrupt economic activity and revenue. The article warns that renewed attacks on Gulf energy infrastructure would likely push energy prices even higher, increasing pressure beyond the immediate combat zone.

05

What are air-defence systems, and how might stealthier missiles and drones try to get past them?

Air-defence systems are military networks that detect, track, and attempt to intercept threats in the air. The article does not explain their technical design, but it says the IRGC has advanced stealth technology for missiles and drones. Stealth generally aims to make detection or tracking more difficult.

IRGC spokesperson Hossein Mohebbi claimed these improvements allowed Iranian missiles and drones to pierce air-defence systems. He said they then struck targets accurately during previous fighting with the United States and Israel. The article does not identify the specific systems or weapons involved.

The claim matters because successful penetration can reduce the protection offered around military or strategic sites. It may also strengthen Iran’s deterrence message. However, the article presents this as Mohebbi’s assertion and supplies no independent assessment of how effective the technology was or how it would perform in a future conflict.

06

Why are the United States and its allies trying to block Iran’s land routes, oil exports, and access to advanced weapons materials?

The United States is trying to limit Iran’s ability to transport advanced weapons and other materials, export oil, and sustain military pressure. CENTCOM announced a task force to support efforts against Iran’s land routes. Washington has also imposed additional sanctions and a naval blockade intended to prevent oil exports.

The article gives different stated purposes for these measures. The task force is meant to stop land transport of advanced weapons and materials. Sanctions seek to force Tehran to concede to US demands and have further strained Iran’s economy. The blockade is aimed at preventing Iran from exporting oil.

These actions connect military and economic pressure. Restricting routes may make weapons movement harder, while sanctions and the blockade reduce trade options and revenue. The article says Iran has responded by adopting new trade routes. It does not detail the routes or measure how effective the US efforts have been.

07

How do weapons production, military deterrence, sanctions, energy infrastructure, and oil prices become connected during a regional war?

These issues form a chain. Weapons production supplies missiles and drones. Those weapons support deterrence by threatening an opponent with costly retaliation. Underground facilities matter because they may keep production and storage operating even under bombardment.

The article links Iranian attacks to billions of dollars in damage to US bases and Gulf infrastructure. It also says Iran has warned it could target Gulf energy infrastructure if fighting resumes. Such attacks could reduce energy activity and lost revenues, while the article says they would likely push energy prices higher.

Sanctions and blockades add economic pressure by restricting trade routes and oil exports. The United States says it is using these tools to force Iranian concessions and limit advanced weapons transfers. Iran, meanwhile, is adopting new trade routes and warning of retaliation. The result is a feedback loop between military capacity, economic pressure, energy disruption, and the risks of wider escalation.

This brief was written by AI from the original reporting and checked by other models. Names, figures and quotes come from the source; read it for full context.

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