Iran has brought its long-developed “mosaic defense” doctrine into renewed operational focus, relying on provincial Islamic Revolutionary Guard Corps (IRGC) commands that can keep functioning when contact with Tehran is disrupted. The system is frequently described as a network of 31 or 32 provincial command blocs, depending on whether separate Tehran formations are counted individually. Its purpose is not to abolish national command, but to make Iran’s defense structure harder to paralyze through attacks on senior leaders or communications.
Recent reporting has portrayed the model as an answer to wartime pressure and the danger of a “decapitation” strike. Under the doctrine, local commanders follow plans and broad instructions issued in advance, while retaining substantial freedom to respond if central command links fail. That is more precise than saying every unit has an unrestricted license to fire: strategic policy remains national, but tactical execution can be decentralized in an emergency.
What Iran’s Mosaic Defense System Means
The concept dates to the mid-2000s, when then-IRGC strategist Mohammad Ali Jafari promoted a flexible, layered defense after studying the rapid collapse of Saddam Hussein’s centralized system in Iraq. Iran subsequently reorganized IRGC and Basij structures around provincial commands. A detailed US Joint Chiefs of Staff historical study says the plan decentralized command to the provincial level so that local formations could respond to both external attack and internal crisis.
The terminology matters. “Mosaic” describes a country divided into defensive tiles. If one tile—or even the center—is disabled, the surrounding tiles are intended to remain active. Research published by the US Army’s Operational Environment and Threat Analysis Directorate similarly characterizes the doctrine as a layered land-defense strategy that stresses autonomous small-unit operations, mobility, survivability and popular resistance.
| Mosaic Defense Sequence |
|---|
| National leaders establish strategic objectives and issue broad contingency instructions. |
| Provincial IRGC commands maintain local personnel, intelligence, logistics and Basij networks. |
| If communications with Tehran are degraded, regional commanders continue preplanned defensive operations. |
| Independent “tiles” disperse forces, preserve mobility and avoid a single point of failure. |
| Central coordination can resume when secure communications and an effective chain of command are restored. |
Why Reports Refer to 32 Sectors
Iran has 31 provinces, but descriptions of the IRGC structure do not always use the same total. Some research counts 31 commands—one per province, with Tehran treated within that framework—while other accounts describe 32 blocs because Tehran has had separate formations for the capital and the surrounding province. An analysis from Critical Threats documented the 2008 reorganization and explained that Tehran received an additional command arrangement.
This accounting difference does not change the doctrine’s central logic. Provincial corps are expected to know their own terrain, recruit locally, integrate nearby Basij units and retain enough communications and supplies to operate under pressure. The structure also complicates an adversary’s targeting problem: disabling headquarters in Tehran would not automatically dissolve every command elsewhere in the country.
Centralized Command Versus the Mosaic Model
| Feature | Traditional Centralized Model | Iran’s Mosaic Model |
|---|---|---|
| Decision flow | Orders move down from a national headquarters | Broad guidance is national; local execution can continue independently |
| Failure risk | Loss of senior command may stall subordinate units | Provincial nodes are designed to survive isolation |
| Local knowledge | National planners dominate operational choices | Provincial commanders use local terrain and networks |
| Coordination | Usually more consistent across the force | Harder to synchronize when communications are degraded |
| Escalation control | Senior leaders retain tighter control over engagements | Delegated authority can increase miscalculation risk |
Local Authority Does Not Mean Unlimited Authority
The phrase “without Tehran’s permission” should be understood in a contingency context. Public evidence supports the idea that provincial commands can act when cut off, based on instructions and doctrine established beforehand. It does not prove that every commander can independently launch any strategic weapon or set national war aims. Those higher-level decisions would remain tied to Iran’s political leadership, Supreme National Security Council and senior military chain of command.
In a recent explanation of the doctrine, Radio Free Europe/Radio Liberty reported that each province has its own IRGC headquarters and command structure. The report quoted analysts describing local commanders as able to keep units cohesive if they are disconnected from Tehran. That resilience is the system’s principal advantage.
How the System Could Strengthen Iranian Defense
First, decentralization protects continuity. A dispersed chain of command is more difficult to destroy in one strike. Second, provincial forces can move quickly because they do not need to wait for detailed instructions for every tactical decision. Third, the doctrine makes use of geography—from mountains and cities to long internal supply routes—to complicate a technologically superior attacker’s campaign.
The model also links regular and irregular capabilities. Iran’s conventional army can contest an invasion while the IRGC and Basij use dispersed positions, local intelligence and asymmetric tactics. A 2025 US government assessment of Iran’s mosaic defense strategy says the IRGC maintains command-and-control nodes across the provinces and trains for guerrilla tactics, ambushes and survivability measures.
The Risks: Miscalculation, Duplication and Escalation
Resilience comes at a price. Local autonomy can create uneven decisions, especially when commanders receive incomplete information or interpret standing orders differently. One unit may view an approaching aircraft, drone or missile as an imminent threat while another waits for confirmation. During a fast-moving crisis, that divergence could cause an unintended engagement and widen a conflict.
Decentralization can also complicate de-escalation. Even if leaders in Tehran want to pause operations, they must securely reach every relevant command and confirm that instructions were understood. Damaged communications, electronic warfare or conflicting reports could delay that process. Provincial units may also compete for scarce air-defense interceptors, fuel and communications equipment.
What to Watch Next
The clearest indicators will be official appointments to provincial commands, changes in regional exercises, new protected communications networks and statements about pre-delegated wartime authority. Analysts should also distinguish the IRGC’s provincial ground-security structure from Iran’s national air-defense network; the two can cooperate, but they are not automatically identical.
The broader conclusion is that Iran’s 32-sector description represents the wartime application of a doctrine built over nearly two decades, not an entirely new invention. Its local units are designed to keep fighting when Tehran cannot issue real-time orders. That makes the Iranian system harder to disable, but it also increases the burden of coordination and the danger that a local decision could carry national consequences.