IRGC: How Iran's Revolutionary Guard Went from Ideological Militia to State-Within-a-State

It was founded in May 1979 to protect a revolution that was only three months old. By 2026, Reuters was describing it as a state-within-a-state — with its own economy, its own media empire, its own foreign policy apparatus, its own construction company employing 25,000 engineers, and enough political power that at least one analyst believes it exceeds even the Supreme Leader's authority. This is the story of how a paramilitary force created to guard a revolution became the revolution's most powerful institution.

In May 1979, three months after the Iranian Revolution overthrew the Shah, Ayatollah Khomeini signed a decree establishing a new military force. The regular Iranian army still existed, but the new government did not fully trust it — the army had served the Shah, its officer corps had been trained by Americans, and its loyalties were uncertain. The revolution needed its own armed wing. Something ideological in its bones. Something that would protect not just the territory of Iran but the revolution itself. The Islamic Revolutionary Guard Corps — Sepah in Persian, meaning corps or army — was that force. It started as a collection of paramilitary groups fused together under a single command. By the 1980s, it had its own ground forces, navy, air force, and intelligence apparatus. By the 2000s, it controlled Iran's ballistic missile program. By the 2010s, it was operating in Syria, Iraq, Yemen, and Lebanon simultaneously while running a domestic business empire worth tens of billions of dollars. By 2026, Reuters called it a state-within-a-state. The distance between those two points — a newly formed ideological militia in 1979 and the most powerful institution in a country of 92 million people forty-seven years later — is the story of how the IRGC actually works.

The IRGC was created in 1979 as a counterweight to the regular Iranian army — but within decades it had grown into Iran's dominant military, economic, and political institution.

Why It Was Created — and What Problem It Was Solving

The logic behind the IRGC's creation was straightforward. Every revolution that has ever seized state power faces the same fundamental problem: the state it just took over comes with a pre-existing military, police force, and bureaucracy built to serve the previous government. Sometimes those institutions switch loyalties. Sometimes they do not. Sometimes they wait for an opportunity to switch back. Khomeini and the revolutionary leadership did not want to find out which category the Shah's army fell into. The solution was to create a separate armed force that owed its existence entirely to the revolution — one that had no institutional memory of serving anyone else, whose entire identity was built around the Islamic Republic, and whose members were selected for ideological commitment rather than professional credentials. The Iranian Constitution makes this mandate explicit. The regular military — the Artesh — is responsible for protecting Iran's territorial sovereignty in the conventional sense. The IRGC is responsible for protecting the revolution itself. In practice, that second mandate has proven considerably more expansive than the first. Protecting the revolution has been interpreted over the decades to mean preventing coups by the traditional military, crushing domestic dissent, conducting foreign operations that advance the Islamic Republic's interests, and running the parts of the state that the clerical leadership wanted controlled by loyal hands. Khomeini urged in principle that the military should stay out of politics. The Constitution's definition of the IRGC's mission made that instruction essentially impossible to follow.

The Iran-Iraq War: Where It Became Powerful

The eight-year Iran-Iraq War, which started when Iraq invaded in September 1980, was the crucible in which the IRGC transformed from a security apparatus into a genuine military force. At the start of the war, the IRGC received about seven percent of Iran's military budget. By 1982, it was twenty percent. By 1987, it was approaching fifty. The share of national resources flowing to the Guards tracked directly with their growing importance — and their growing independent weight within the state. The war also produced something the IRGC had not had at its founding: a separate culture. The Pasdaran — Guardians — who fought the Iran-Iraq War were defined by that experience. Survivors of an eight-year conflict in which Iraq used chemical weapons, in which the international community largely supported Iraq, and in which Iran pushed through with a combination of ideological intensity and massive manpower. The war created a generation of IRGC officers who understood themselves as having sacrificed for the revolution in ways that justified their later authority. Along with the Basij — the volunteer militia that Khomeini had called for in November 1979, which in the war's most brutal phases sent waves of recruits including very young men across minefields — the IRGC emerged from 1988 as an institution that had earned, in its own accounting, the political credit to exercise real power.

The Iran-Iraq War was the IRGC's formative experience — the eight-year conflict transformed what had been an ideological militia into a major military force while generating the organizational culture that shaped the Guard's behavior in subsequent decades.

The Five Branches — What Each One Actually Does

The IRGC is not a single military branch. It is five of them, each with a distinct function, and the combination is what makes it unlike most military organizations anywhere in the world. The Ground Forces are the largest component — roughly 150,000 personnel — and focus primarily on internal security and order. In recent years they have also developed expeditionary capabilities, operating outside Iran in ways that were not part of the original mandate. The Aerospace Force controls Iran's ballistic missile program. Not just the missiles but the development, production, and doctrine around them. Iran has the largest and most diverse ballistic missile arsenal in the Middle East, and it belongs to this branch. The Aerospace Force also functions as Iran's space force — it was responsible for launching the Omid satellite in 2009 and subsequent space launches. Its 15,000 personnel manage thousands of short- and medium-range mobile ballistic missiles, including the Shahab-3, which has a range reaching up to 2,100 kilometers. The Navy operates separately from the regular Iranian navy and has effectively become the primary operational force in the Persian Gulf. Its equipment is asymmetric — lots of small fast attack craft, swarm tactics, coastal missiles, mines — designed for a very different kind of conflict than the conventional blue-water navy the Artesh nominally maintains. The Basij is the volunteer militia, technically under the IRGC umbrella since 2008. Its active core is somewhere around 90,000 people, with hundreds of thousands of reservists who can be mobilized when needed. The Basij is what you see on Iranian streets during protests — the plainclothes and uniformed forces cracking down on demonstrations. It is the visible face of regime enforcement at the local level. The Quds Force is something else entirely. It is the external operations arm — 2,000 to 5,000 personnel — responsible for training, arming, advising, and in some cases commanding proxy forces outside Iran. Hezbollah in Lebanon. The Houthis in Yemen. Iraqi Shia militias. Palestinian groups. Afghan fighters recruited from refugees living in Iran. Pakistani recruits organized through the Zainabiyoun Brigade. The Quds Force is the institutional mechanism through which Iran projects influence across the region without committing regular Iranian military forces directly.

Qasem Soleimani and the Quds Force at Its Peak

No single person embodied what the IRGC became in the twenty-first century better than Qasem Soleimani, who commanded the Quds Force from 1998 until his death. Soleimani was described by some analysts as the second most powerful person in Iran after Khamenei — which is probably accurate and also somewhat understates the case, because Soleimani's operational domain was specific and he exercised near-total authority within it. He coordinated Iran's proxy network across the entire Middle East, personally overseeing the relationships with Hezbollah, with Iraqi Shia militias, with Assad's forces in Syria. He was present at key battles. He negotiated directly with foreign militaries and political leaders. He moved between Tehran, Beirut, Baghdad, and Damascus with a freedom that reflected his unique position. In Syria, beginning in 2011, Soleimani organized Iran's military support for Bashar al-Assad's government as the civil war expanded. The IRGC's involvement went well beyond advising — it included direct combat by IRGC officers alongside Hezbollah fighters and Afghan and Pakistani auxiliaries organized by the Quds Force. By late 2015, 194 IRGC troops had been killed in Syria, almost all of them officers. The Afghan fighters of the Fatemiyoun Brigade — recruited from refugees living in Iran, paid salaries by the Iranian military, and given state funerals involving uniformed IRGC personnel — were casualties who barely registered in Western reporting at the time. When ISIS swept through northern Iraq in 2014, Soleimani was again personally involved in organizing the response. He was photographed on Iraqi battlefields. He coordinated the Popular Mobilization Forces — the Shia militia coalition that fought alongside the Iraqi military against ISIS — and was credited, by multiple observers including some who were not sympathetic to Iran, with playing a significant role in stopping the ISIS advance. On 3 January 2020, a U.S. drone strike at Baghdad airport killed Soleimani along with Abu Mahdi al-Muhandis, the commander of Kata'ib Hezbollah and deputy head of the PMF. The Iranian response was a ballistic missile strike on American bases in Iraq — the largest such attack on American forces in history. 110 U.S. military personnel sustained traumatic brain injuries. Days later, in the confusion following the strike, the IRGC shot down Ukraine International Airlines Flight 752, killing all 176 people aboard. The government initially denied responsibility; an international investigation made denial untenable, and the IRGC's Aerospace Force eventually admitted it had mistaken the Airbus A300 for a cruise missile.

The Quds Force — the IRGC's external operations branch — built and managed Iran's proxy network across Lebanon, Syria, Iraq, Yemen, and beyond, making it the primary instrument of Iranian regional influence for decades.