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Mosaic Defence Architecture
Concept

Mosaic Defence Architecture

Iran's decentralised military command; 31 IRGC units can operate without central orders.

Last refreshed: 13 April 2026

Key Question

Can a ceasefire hold when 31 commanders each decide for themselves?

Timeline for Mosaic Defence Architecture

Common Questions
What is Iran mosaic defence doctrine?
A decentralised command structure dividing the IRGC into 31 autonomous provincial divisions, each authorised to act without orders from Tehran.Source: IRGC restructuring event
Why can Iran not enforce the ceasefire?
The 31 IRGC divisions operate semi-independently; with Khamenei reportedly incapacitated, there is no single authority binding all of them to the same interpretation.Source: Khamenei unconscious report
How many IRGC units are operating independently?
31 provincial divisions, each with its own commander authorised to conduct strikes without central approval since the doctrine was activated in early 2026.Source: IRGC restructuring event
Did Iran plan for its leaders to be killed?
Yes. The Mosaic Defence Architecture was designed after the Iran-Iraq War specifically so that killing senior commanders would not paralyse operations.Source: doctrine background

Background

Iran's Mosaic Defence Architecture has become the defining uncertainty of the 2026 Ceasefire. With Mojtaba Khamenei reported unconscious and unable to issue orders, the 31 semi-autonomous IRGC ground force divisions may each be interpreting the Ceasefire differently. Some have continued strikes while others stand down, meaning compliance depends not on one decision but on 31 separate commanders related event.

The doctrine emerged from Iran's experience in the Iran-Iraq War, during which centralised command proved catastrophic when senior officers were killed. After the assassination of IRGC commanders in the opening days of the 2026 conflict, Iran formally activated the structure: the IRGC was restructured into 31 provincial units, each authorised to conduct strikes without central authorisation. Regional commanders hold operational independence as a deliberate design, not a breakdown of discipline .

The architecture makes post-conflict verification nearly impossible. A Ceasefire is notionally in effect, but the framework assumes a single sovereign command can enforce it. If 31 commands are each reading the terms through their own security calculus, there is no throat to grab if a unit fires. US and Israeli planners treated the decapitation of IRGC leadership as a war-winning move; the mosaic doctrine was designed precisely to survive that.