What would happen if her communications were cut, her central infrastructure collapsed and she was wiped out by one? For analysts, this would mean the end of the regime. For Tehran, however, it is simply the “Scenario A” on which it has been building its defense for two decades.
Based on the doctrine of “Decentralized Mosaic Defense,” Iran has turned its territory into a series of semi-autonomous “islands” of resistance, capable of fighting even without a central command. From the Mao Zedong model to the “fourth successor” strategy, Tehran is betting not on technological superiority, but on an asymmetric attrition trap, which intends to turn every enemy weaponry into a dead-end, high-cost quagmire.
So when Iran’s foreign minister, Abbas Araghchi, said Tehran had been studying US wars for 20 years to build a system that would keep fighting even if the capital was leveled, he wasn’t just describing his country’s resilience. He described the logic of the “Doctrine of the Mosaic”.
We’ve had two decades to study defeats of the U.S. military to our immediate east and west. We’ve incorporated lessons accordingly.
Bombings in our capital have no impact on our ability to conduct war. Decentralized Mosaic Defense enables us to decide when—and how—war will end.
— Seyed Abbas Araghchi (@araghchi)
At the heart of this strategy is a central assumption: In a war with Washington or Tel Aviv, Iran could lose top commanders, critical infrastructure, communications networks, and even central control. Still, he should be able to keep fighting.
What is “Defense Mosaic”?
The concept of “mosaic defense” was mainly developed by the Revolutionary Guards (IRGC), under the leadership of Mohammad Ali Jafari. The central idea is to organize the defense structure of the state at multiple regional and semi-autonomous levels, instead of a single chain of command, which could be paralyzed by a “surgical” blow to the leadership.
If one piece of the mosaic is hit, the rest continue to work. If communications are cut, local units have the authority and ability to act autonomously. Iran sees the war not as a trial by fire, but as a test of endurance.
The “lesson” from the fall of Saddam Hussein
The shift towards this model took place after the US invasion of Afghanistan (2001) and Iraq (2003). The rapid collapse of Saddam Hussein’s regime left a deep mark on Tehran’s strategic thinking.
Iran saw what happens to a centralized state when faced with US hyperweaponism: the command structure was battered, the system fragmented and the regime fell in a matter of days. Tehran’s response was to diffuse power.
How doctrine works on the battlefield
In case of conflict, the roles are predefined:
- The Regular Army (Artesh): Takes on absorbing the first blow and delaying the enemy advance.
- The Revolutionary Guards and the Basij: They turn the conflict into a war of attrition, through ambushes, local resistance and sabotage in urban centers and mountains.
- Naval and Missile Forces: They aim to make navigation in the Straits of Hormuz dangerous and impose costs on enemy infrastructure.
- The Regional Allies: Proxy powers in the Middle East ensure that the war will not be confined to Iranian soil.
- The cost asymmetry: A Shahed drone costs a few thousand dollars, while its interceptor missile costs millions. For Iran, time is a strategic weapon.
The “Prolonged War” theory and Mao
Iran’s doctrine borrows elements from Mao Zedong’s theory. The central assumption is that the weaker side does not need to quickly defeat the stronger enemy.
It just needs to survive the initial shock, exhaust the opponent’s supply chain and political will, and gradually shift the balance of power.
The Conundrum of the ‘Fourth Crown’
Perhaps the clearest expression of this logic is succession planning. Supreme Leader Ali Khamenei has reportedly instructed that there be up to four pre-determined successors for each critical military and political position.
This means that killing or isolating a leader does not cause paralysis. If the first substitute cannot take over, the second, third or fourth is already on hand. The system is designed to “self-heal” under enemy fire.
Why does this matter today?
This doctrine suggests that Iran was preparing for exactly the type of war that its opponents hoped would bring it down quickly. While the US and Israel rely on the “beheading” strategy (targeting leadership), Iran has designed a state that survives without a head.
Tehran’s strategy was not designed for a short exchange of blows, but for a battle of survival, where the death of a leader – even Khamenei – does not signal the end, but the activation of the next layer of the “mosaic”.
The expansion of the “Doctrine of the Mosaic” in the Middle East
The implementation of the “Mosaic Doctrine” is no longer a theoretical exercise on paper, but a living reality that we see unfolding on almost all fronts in the Middle East.
Here is a breakdown of the three main pillars that show how Tehran applies this doctrine to current developments:
1. The “decentralized” survival of Hezbollah and Hamas
Despite Israel’s crushing blows to Hezbollah’s leadership (assassination of Nasrallah and his successors), the organization continues to launch rockets and mount resistance in southern Lebanon. This is “Mosaic” in action:
- Local Autonomy: Units in the field are trained to operate without orders from Beirut.
- Resilience to “15-Day Paralysis”: The doctrine provided that even if all communications were cut, local commanders would have predetermined targets for weeks.
2. The “Drone War” as an economic hemorrhage
The Houthis’ use of Shahed drones in the Red Sea and their production inside Iran constitutes the “economic arm” of the doctrine:
- Asymmetric Attrition: Iran forces Israel and the US to spend billions on interceptor missiles (Arrow, Patriot) to shoot down “cheap” Iranian weapons.
- Patience Strategy: Tehran is betting that the West will tire of the costs and political pressure of a protracted war, while Iran itself has adjusted its economy to “war endurance” conditions.
3. The “Peripheral Diaspora” (Forward Defense)
Iran is not waiting for war on its borders. The doctrine of “Advanced Defence” means that Tehran’s first line of defense is in the Mediterranean, the Red Sea and Iraq.
- Multiple Fronts: If Israel strikes Iran directly, the response comes not only from its soil, but from 4-5 different points at the same time, dispersing the opponent’s defense power.
Iran is not seeking a “victory” in the traditional sense (capturing territory or destroying the enemy’s army). Pursues non-defeat. As long as the system remains standing and continues to generate costs, the doctrine is considered successful.
