Iran’s diverse and unique geography plays a significant role in managing the ongoing confrontation with the United States and the Israeli occupation state. Its vast territory and rugged terrain transform the country into a natural fortress capable of resisting both ground invasions and aerial operations.
Massive mountain ranges, harsh plateaus, and deep valleys covered with dense forests stretch across much of Iran’s land borders with neighbouring states. These geographical features restrict large scale military movement, forcing any advancing forces into narrow and dangerous mountain corridors that could easily become points of vulnerability.
Iran’s geography has therefore become a decisive component of its military doctrine. With an area of approximately 1.6 million square kilometres, the country’s harsh terrain and vast scale effectively turn it into what resembles a natural fortress. Recently, Iran has reinforced this advantage through a new military structure that divides its armed forces into separate units distributed across the country’s provinces.
How Geography Shaped the Division of the Armed Forces
Iran’s geographical landscape has created a distinctive model that directly influenced the structure of its armed forces. The rugged terrain and enormous territorial spread have produced a new reality in the organisation of both the army and the Islamic Revolutionary Guard Corps.
Under this system, the forces have been divided into separate units distributed across the country’s 31 provinces. Each province can operate independently as a local military force, relying on its deep familiarity with the surrounding mountains and valleys to establish ambushes and exhaust invading forces.
How the Decentralised “Mosaic Defence” Works
According to the newspaper The Sunday Guardian, each Iranian military unit operates independently like a piece of a puzzle, with commanders granted full tactical authority. They are able to launch missiles, deploy drones, conduct raids, and carry out guerrilla warfare operations without waiting for centralised command.
The newspaper also noted that Iran conducted training exercises last month to test independent smart control over army units in anticipation of potential attacks. This model is now reportedly being applied in practice during the current American Israeli confrontation.
The approach recalls the warfare traps seen in Vietnam and Afghanistan. Iran’s Revolutionary Guard ground, naval, and air forces operate in coordination while provincial units manage their own operational theatres.
Mountains as Shields
Iran’s mountains represent a natural barrier against any ground invasion. Major ranges such as the Zagros and Alborz significantly limit the movement of heavy military vehicles. Any invading force would therefore be compelled to move through narrow mountain passes that are easily targeted and blocked.
This mountainous environment has also allowed Iran to develop extensive concealment and camouflage strategies, including the construction of strategic military sites hidden deep within mountainous regions.
Among these are what are known as missile cities. Iran uses the depth of its mountains to carve massive tunnels and underground bases, making it extremely difficult to destroy its missile and drone arsenals even through concentrated air strikes.
Deep and Isolated Deserts
Iran is also surrounded by vast and isolated desert regions that can swallow the supply lines of any ground force attempting to penetrate the country. Two of the most prominent examples are the expansive Dasht e Kavir and Dasht e Lut deserts.
Iran has not ignored these deserts. Instead, it has transformed them into zones designed to exhaust adversaries economically and militarily. Low cost drones and mobile missile systems can be launched from deep within the desert, forcing attacking powers to deploy extremely expensive defence systems to intercept them, effectively reversing the cost balance of warfare.
General Pasquale Preziosa, former Chief of Staff of the Italian Air Force, wrote in an analysis published by Defense.info that Iran’s barren desert environment forms an internal barrier dividing the country into different geographical zones. This makes Iran large, complex, difficult to traverse, and even harder to subdue.
Its cities, economy, and strategic mindset are all deeply shaped by a unique geographical composition formed by a combination of mountains, plateaus, and deserts that together create a natural barrier. According to Preziosa, this barrier performs a dual function. It protects the country from invasions while at the same time limiting aspects of its economic development and strategic orientation.
Vast Territory
Iran’s territory extends across roughly 1.65 million square kilometres, creating a natural defensive shield that makes any ground invasion an enormous logistical and military challenge.
Such vast space disperses the capabilities of potential adversaries. Any army attempting to control such a territory would face immense human and financial costs, leading to a prolonged war of attrition. In such a scenario, Iran itself would hold the advantage, relying on its vast geography and extremely rugged terrain.
The Maritime Axis
At sea, Iran possesses a critical geopolitical instrument: the Strait of Hormuz. This narrow passage links the Arabian Gulf with the Gulf of Oman and represents one of the most important energy corridors in the global system. A significant share of the world’s oil exports passes through this relatively narrow waterway.
Its geographical position allows Iran to exercise a form of economic deterrence. Controlling a dominant naval fleet is not necessarily required to influence global energy markets. The ability to threaten a strategic chokepoint where the global energy system converges is often enough.
The capability to disrupt, or even threaten the security of maritime navigation through the Strait of Hormuz therefore remains a crucial strategic factor in the calculations of any external power considering military action against Tehran, according to the analysis of former Italian Air Force Chief of Staff Pasquale Preziosa.
