In 2005, the IRGC announced that it was incorporating a flexible, layered defense -- referred to as a mosaic defense -- into its doctrine. The lead author of this plan was General Mohammad Jafari, then director of the IRGC's Center for Strategy, who was later appointed commander of the IRGC.
As part of the mosaic defense, the IRGC has restructured its command and control architecture into a system of 31 separate commands -- one for the city of Tehran and 30 for each of Iran's provinces. The primary goal of restructuring has been to strengthen unit cohesion at the local level and give commanders more latitude to respond to potential threats -- both foreign and domestic. But the new structure would also make it difficult for hostile forces to degrade Iranian command and control, a lesson the Iranian military has learned by analyzing U.S. operations in Iraq, Afghanistan, and the Balkans.
The mosaic defense plan allows Iran to take advantage of its strategic depth and formidable geography to mount an insurgency against invading forces. Most of Iran's population centers and major lines of communication are spread out within the interior of the country. Iran's borders are ringed by rugged mountain ranges that serve as natural barriers to invasion. As enemy supply lines stretched into Iran's interior, they would be vulnerable to interdiction by special stay-behind cells, which the IRGC has formed to harass enemy rear operations.
The Artesh, a mix of armored, infantry and mechanized units, would constitute Iran's initial line of defense against invading forces. IRGC troops would support this effort, but they would also form the core of popular resistance, the bulk of which would be supplied by the Basij, the IRGC's paramilitary volunteer force. The IRGC has developed a wartime mobilization plan for the Basij, called the Mo'in Plan, according to which Basij personnel would augment regular IRGC units in an invasion scenario.
IRGC and Basij exercises have featured simulated ambushes on enemy armored columns and helicopters. Much of this training has been conducted in an urban environment, suggesting that Iran intends to lure enemy forces into cities where they would be deprived of mobility and close air support. Iran has emphasized passive defense measures -- techniques used to enhance the battlefield survivability -- including camouflage, concealment and deception.
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