The Two Militaries of Iran: Why the IRGC and Artesh Matter More Than Most Americans Realize
By: Ken Robinson
Americans tend to picture foreign militaries as a single chain of command. Iran is different. The Islamic Republic built a dual security system after 1979 that separates the forces designed to defend the nation from the forces designed to defend the revolution.
That division is not a footnote. It is the core institutional reality that shapes Iran’s behavior in war, crisis, and succession.
One force is the conventional armed service called the Artesh, the regular army of Iran. The other is the Islamic Revolutionary Guard Corps, or IRGC, a parallel military and security institution built to preserve the clerical state. In normal times, the two systems coexist uneasily. In abnormal times, they can compete.
When outsiders try to predict Iran’s next move without understanding this split, they often misread what is possible and what is not.
Recent open source reporting suggests that strikes and leadership losses have disrupted elements of Iran’s senior command and operational coordination. Analysts tracking the situation note indicators of stress across command and control, including fear driven absenteeism at some bases in the wake of strikes on military infrastructure.
The Institute for the Study of War and Critical Threats Project has described disruption risks in the Iranian chain of command in its Iran updates.
To understand what those disruptions might mean, it helps to step back and ask why the Islamic Republic built two militaries in the first place.
After the Shah fell in 1979, the new clerical leadership inherited a professional, national army. That army had been modernized for decades and had been equipped heavily with Western systems.
But it was not designed to protect a religious revolution.
It was designed to defend the Iranian state. The clerical leadership did not fully trust it. In the early revolutionary period, there were purges, arrests, and reorganizations. But the regime also needed a conventional military to fight Iraq and defend borders.
So it kept the Artesh.
Then it created a second force to ensure the first one could never become the sole arbiter of coercive power.
That second force was the IRGC.
Over time, it became the regime’s decisive instrument for internal security, ideological enforcement, and strategic power projection. The IRGC controls key missile and drone capabilities, runs the Quds Force for external operations, and anchors the Basij mobilization network. Critical Threats Project provides a concise overview of how the IRGC services roughly parallel the Artesh, while retaining additional internal security branches.
This is the design logic of coup proofing.
Authoritarian systems often build parallel armed organizations so no single professional military can overthrow the ruling elite. Saddam Hussein relied on elite formations alongside the regular army. The Soviet system fused internal security with military power.
Iran institutionalized that logic by creating a revolutionary guard that is as much a political institution as a military one.
For American readers, a useful analogy is to think of the Artesh as Iran’s national military, and the IRGC as a hybrid of strategic forces, internal security, and political enforcement.
The analogy is imperfect, but it captures the key idea.
One institution is oriented toward the country. The other is oriented toward the regime. In a crisis, those orientations matter.
IRGC command structure versus Artesh command structure
The first mistake outsiders make is assuming both forces report through the same operational channels. They do not. Iran has a top level command structure that formally oversees all armed forces.
But the practical distribution of power is layered and political.
At the top, the Supreme Leader is the commander in chief. The Supreme Leader’s office includes a military bureau and an ecosystem of trusted advisers that shapes appointments, promotions, and red lines. This is part of what makes the system resilient even when personalities change.
Below that is the Armed Forces General Staff. It is the institutional bridge over both the IRGC and the Artesh, and it provides strategic coordination and policy guidance. Critical Threats Project describes the General Staff and the joint command architecture, including the role of Khatam al Anbiya Central Headquarters as the unified combatant command for joint operations.
Khatam al Anbiya Central Headquarters functions as the joint operational command.
In U.S. terms, it is closer to a standing joint operations headquarters than a service staff. It is designed to coordinate joint military operations across the different services. Open sources describe it as operating under the General Staff and responsible for operational command and control.
From there, the chains diverge.
The Artesh has ts own joint staff that coordinates four conventional branches: ground forces, air force, navy, and air defense.
The Artesh is oriented around conventional defense missions, territorial integrity, and service professionalism. Its senior culture has historically emphasized national defense rather than ideological policing.
The IRGC, by contrast, is organized into services that mirror the conventional military but with critical additions.
It has ground, navy, and aerospace forces, plus the Quds Force for expeditionary operations, and the Basij for internal mobilization.
It also includes intelligence and security branches that are central to regime survival. The Council on Foreign Relations summarizes the IRGC’s role in controlling missile forces and overseeing the Quds Force.
That difference drives how each organization thinks.
The Artesh plans like a conventional force. The IRGC plans like a revolutionary security institution with a military component. Its navy focuses on asymmetric maritime operations. Its aerospace force is central to missile and drone strategy. Its intelligence apparatus is built to detect and suppress threats to the system, including internal dissent.
These two cultures can cooperate in war. They also compete for resources, prestige, and access. Analysts have long noted tensions and overlapping responsibilities between the Artesh and the IRGC. The existence of a parallel guard creates duplication by design. That duplication is a feature, not a bug.
It is how the regime manages risk.
Key Iranian military institutions we are watching now
In a stress environment, analysts focus less on rhetoric and more on institutions that control coercion, coordination, and succession.
Several nodes matter:
First is the Armed Forces General Staff and its ability to keep joint coherence across the system. When command and control degrades, the General Staff’s authority and communication reach become a leading indicator of whether the state can coordinate responses or whether factions begin to free wheel.
Second is Khatam al Anbiya Central Headquarters, the operational coordinator for joint military operations. If it functions, Iran can synchronize air defense, missile defense, and conventional responses. If it fractures, Iran’s force employment becomes more localized, and factional decision making becomes more likely.
Third is the IRGC Aerospace Force, which is central to Iran’s missile and drone inventory and to deterrence signaling. CTP-ISW notes the centrality of the IRGC to missile and drone arsenals, and the strategic importance of these capabilities to Iran’s approach.
Fourth is the IRGC Intelligence Organization and the broader internal security ecosystem, including Basij mobilization networks and law enforcement structures. In many Iranian crises, street control and elite intimidation, not conventional combat power, decide regime survivability.
Fifth is the Quds Force, which matters for external escalation management. Even in internal crisis, the regime can seek external leverage through proxy signaling. But leadership disruption and operational pressure can constrain the Quds Force’s freedom of action.
On the Artesh side, analysts watch the Air Defense Force and the air defense command architecture. Critical Threats Project notes that the Khatam ol Anbiya Air Defense Headquarters has historically been commanded by a senior Artesh officer and oversees air defense units. In a strike environment, this network becomes central to protecting regime continuity.
Analysts also watch the Law Enforcement Command and other internal policing institutions, which can become the swing forces between protest containment and escalation. When a regime fears mass unrest, it often leans on police and paramilitary units first, holding the conventional military in reserve.
Why dual military systems exist in authoritarian states
Americans should not treat the IRGC as just another military branch. It is closer to a regime survival architecture with armed wings. Dual military systems are built because ruling elites distrust conventional militaries.
A professional army tends to develop loyalties to the nation, to the institution, and to professional norms. Those loyalties can diverge from loyalty to a ruling ideology.
So regimes build parallel forces that are vetted for political loyalty, embedded in patronage networks, and given privileged access to resources. These forces are tasked with internal security and with monitoring the regular military.
This reduces coup risk but creates long term friction and inefficiency. It also means that when a regime is under extreme pressure, the question is not simply whether it has enough firepower.
The question is whether its internal coercive institutions remain coherent.
In the current Iranian context, the key public question is whether the Artesh could side with mass protest if the IRGC and clerical leadership are weakened. History suggests that outright military coups are rare without elite consensus. The more realistic pivot point is neutrality.
If the Artesh refuses to participate in large scale lethal repression, the regime must rely on the IRGC, Basij, and internal security services. If those forces remain unified, they can often suppress unrest. If they fragment, even a cautious Artesh stance can accelerate political change.
This is why we watch subtle indicators: whether units remain in garrison, whether public messaging shifts from loyalty framing toward nation framing, and whether command continuity holds.
Open source reporting points to stress and caution in parts of the conventional force posture after strikes, including reports of disrupted reporting patterns at some bases. That is not evidence of defection. It is evidence of uncertainty. In systems built on layered security institutions, uncertainty can be stabilizing or destabilizing depending on whether the regime can reassert a coherent chain of command.
The strategic implication for Washington is that Iran’s internal future will likely be shaped less by foreign pressure than by domestic institutional behavior. The dual military structure was designed to prevent an Artesh coup.
It may still do that. But the same structure can also complicate regime recovery after leadership loss because the system depends on multiple coercive institutions acting in concert.
Strategic Miscalculation and BLOW BACK
The risk for U.S. policymakers is strategic miscalculation. It is easy to see disruption and assume collapse. It is also easy to underestimate how quickly a revolutionary security apparatus can reconstitute control, even after senior losses.
The prudent approach is to track institutions, not headlines, and to anticipate that Iran’s internal contest will be decided by the cohesion of its coercive architecture and the willingness of its conventional military to stay neutral under pressure.
Any decision by Washington to have the CIA covertly arm Kurdish forces in the context of Iranian instability will carry a significant risk of strategic blowback.
Within Iran’s fragmented security architecture, both the conventional military (the Artesh) and the ideological security apparatus led by the IRGC have historically shared one core red line: preservation of Iran’s territorial integrity.
Kurdish separatism, whether real or perceived, has long been viewed across the Iranian political spectrum as an existential threat to the state itself.
If Kurdish forces were visibly armed or supported by the United States, it could unintentionally collapse the internal tension between Iran’s two competing power structures.
Instead of the professional military distancing itself from the clerical regime, the threat of territorial fragmentation could rally both institutions around a common nationalist cause.
In that scenario, what might otherwise be a moment of internal fracture could quickly transform into regime consolidation, as the IRGC and the Artesh find temporary unity in confronting what they would frame as a foreign-backed separatist threat.
For U.S. policymakers, the risk is that a tactic intended to pressure the regime could instead reinforce the very coalition of forces that has sustained it since 1979.
A strategic miscalculation that defeats allowing domestic hatred to simply run its course.
Sober warning
If Washington treats Iran as a single actor with a single military logic, it will misread both escalation risks and opportunities for de escalation.
The internal split between revolution and nation is real. It shapes decisions. It can produce sudden shifts. It can also produce violent overcorrections when factions compete for legitimacy.