Iran’s Revolutionary Guards

Iran’s Revolutionary Guards

Conceived as the principal defenders of the 1979 revolution, the Islamic Revolutionary Guard Corps has evolved into an institution with vast political, economic, and military power.
Members of the Revolutionary Guards attend a parliamentary session in Tehran.
Members of the Revolutionary Guards attend a parliamentary session in Tehran. Atta Kenare/AFP/Getty Images
  • Created after Iran’s 1979 revolution to protect the new Islamic regime, the IRGC has become one of the most powerful paramilitary organizations in the Middle East.
  • The IRGC supports militant groups in Iraq, Lebanon, the Palestinian territories, Syria, and Yemen. This “axis of resistance” aims to rid the region of Western (namely U.S. and Israeli) influence.
  • Its control over large sectors of the Iranian economy helps it fund its activities, and sweeping U.S. sanctions don’t seem to be limiting its regional ambitions.


The Islamic Revolutionary Guard Corps (IRGC) is the ideological custodian of Iran’s 1979 revolution. Charged with defending the Islamic Republic against internal and external threats, the corps has gained an outsize role in executing Iran’s foreign policy and wields control over vast segments of the economy. The IRGC’s ties to armed groups in the region, such as Hezbollah in Lebanon and Hamas in the Palestinian territories, help Iran project influence and power. Answering directly to the supreme leader, the corps is also influential in domestic politics, and many senior officials have passed through its ranks.

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After spending late 2022 and most of 2023 focused on quelling domestic unrest, the IRGC has turned its focus to supporting Palestinian militant group Hamas in its latest war against Iran’s longtime enemy Israel. To that end, the IRGC has enabled attacks on Israel by its network of regional partners, or “axis of resistance,” and even fired directly on Israeli territory for the first time, fueling fears that war could engulf the Middle East. In the wake of that attack, in April 2024, Israel has called on more world governments to designate the IRGC as a terrorist organization. The United States did so in 2019, having already labeled Iran a state sponsor of terrorism.

Why was the IRGC established?

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The IRGC was founded in the immediate aftermath of Shah Mohammad Reza Pahlavi’s fall in 1979, as leftists, nationalists, and Islamists jockeyed to set the course of the revolutionary republic. While the interim prime minister controlled the government and state institutions such as the army, many clerics and disciples of Iran’s founding supreme leader, Ayatollah Ruhollah Khomeini, organized counterweights to those inherited institutions. Among them was the IRGC, which operated beyond the bounds of the law and the judiciary. Answering to the supreme leader, its command structure bypasses the elected president.

The guards were conceived as a “people’s army,” helping consolidate the revolution as Khomeini instituted a state based on the concept of velayat-e faqih, or guardianship of the jurist. The aim was to set up Iran as a constitutional republic, enveloped in a theocratic structure. Khomeini intended for the IRGC to protect the new regime from a coup d’état, such as the one in 1953 that ousted the democratically elected government of Mohammed Mossadeq and restored the shah to power.

How is the IRGC organized?

The Iran-Iraq War (1980–88) transformed the IRGC into more of a conventional fighting force, with a command structure similar to that of Western militaries. Now highly institutionalized, it remains a force parallel to that of Iran’s regular armed forces, with upward of 190,000 troops under its command, according to the International Institute for Strategic Studies (IISS). Around half of these personnel are conscripts. The IRGC’s branches include:

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  • ground forces based across Iran’s 31 provinces and Tehran, which number more than 150,000 troops;
  • the Basij paramilitary force, which claims it can mobilize some six hundred thousand volunteers;
  • naval forces, separate from the naval branch of Iran’s regular military, which have some twenty thousand sailors and are charged with patrolling Iran’s maritime borders, including the Strait of Hormuz, through which about one-third of the world’s seaborne crude oil passes each year;
  • an air force of fifteen thousand personnel, also separate from a parallel branch of the regular military, which runs Iran’s ballistic missile program; and
  • a cyber command, which works with IRGC-affiliated businesses on military and commercial espionage, as well as propaganda distribution, according to IISS (its precise relationship with state-affiliated hackers is unclear).

How does the IRGC operate outside of Iran?

As the IRGC first deployed abroad in the Iran-Iraq War, it began sponsoring nonstate armed groups in the region. The expeditionary Quds Force emerged as the IRGC’s de facto external affairs branch, and it has developed ties with armed groups from Afghanistan, Iraq, Lebanon, the Palestinian territories, and elsewhere, providing them with training, weapons, money, and military advice to project Iran’s power abroad. While some of these groups frequently operate independently of Iran and each other, Tehran views them as part of an anti-West “axis of resistance” under its sway. Experts say Iran has attempted to strengthen cooperation within this alliance in recent years.

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By fostering these groups, Tehran has sought to export its revolution and deter aggression from Western countries and its perennial enemy Israel. The Lebanese movement Hezbollah, for example, shares Iran’s hostility toward the United States and Israel, which occupied southern Lebanon when the group was founded. The 1983 bombings of the U.S. embassy and the U.S. Marine Corps and French paratrooper barracks in Beirut, as well as the assassinations of various regime opponents, have been attributed to Iran and its proxies, namely Hezbollah. Additionally, Western and Middle Eastern intelligence officials have tied the IRGC to the 1994 bombing of a Jewish center in Buenos Aires, Argentina, though Tehran says it wasn’t involved.

The IRGC’s involvement in Iraq after the U.S. invasion in 2003 has become a particular point of contention between Tehran and Washington. In 2007, U.S. President George W. Bush accused the Quds Force of providing Shiite Muslim militants with roadside bombs to kill American forces, though experts inside and outside the U.S. government questioned whether such orders came from Tehran directly. The Donald Trump administration blamed the IRGC for the killings of 608 U.S. troops in Iraq between 2003 and 2011.

Following the 2011 regionwide uprisings commonly known as the Arab Spring, the Quds Force deployed to Syria. Iran initially claimed the operatives were carrying out a limited mission defending Shiite shrines but later acknowledged that the force was helping Syrian President Bashar al-Assad suppress unrest. As the discontent turned to civil war, the Quds Force served not just as military advisors, but also on the front lines, fighting alongside Syrian regime forces, Lebanese Hezbollah militants, and Afghan refugees serving in IRGC proxy militias. Meanwhile, after the Arab uprisings similarly sparked a civil war in Yemen, the IRGC channeled intelligence support, training, and weapons to Yemen’s Houthis to help the rebel movement repel the combined forces of the country’s government and Iran’s rival Saudi Arabia.

Iranian officials expanded the Quds Force’s presence in both Iraq and Syria in response to the rise of the Islamic State group. They warned that if the Sunni Muslim militant organization wasn’t defeated there, it would march on Tehran. In Iraq, popular mobilizations of tens of thousands of Shiite militiamen soon eclipsed the national army. Many of these militias pledged loyalty to Iran’s supreme leader and were led by commanders who worked with the Quds Force against the U.S. occupation in the prior decade. The official who led the mobilization, Abu Mahdi al-Muhandis, held both Iraqi and Iranian citizenship and had served as a Quds Force officer. While the mobilization provided the ground forces that rolled back the Islamic State, the United States provided air power, effectively making the guards and U.S. forces tacit partners.

That alliance proved short lived—with the Islamic State largely defeated by 2019, U.S.-Iran hostilities resumed. The following January, a U.S. drone strike killed Muhandis and notorious Quds Force commander Qasem Soleimani, who had cultivated Iran’s many partnerships with armed groups. Washington was keen to stifle the guards’ influence in Iraq, which had come to rely on Iran for security, energy, and trade. Iran and its allies vowed revenge, and Tehran-backed groups ramped up attacks on U.S. coalition forces in Iraq and Syria, with one rocket attack wounding dozens of personnel in 2021.

The ties between the IRGC and its regional network have been increasingly apparent since October 2023, when Hamas fighters and other Palestinian militants perpetrated the most devastating terrorist attack Israel had ever witnessed. They killed more than 1,200 Israelis and foreigners, many of them civilians. The incursion immediately raised questions about whether Iran was involved. At minimum, experts say, Tehran was likely aware of an impending attack that it had facilitated through decades of support for the Palestinian fighters.

In the ensuing Israel-Hamas conflict, the IRGC has provided arms and other assistance to help its partners in Iraq, Lebanon, Syria, and Yemen to attack Israeli targets in solidarity with Hamas. And in April 2024, the IRGC fired hundreds of drones and missiles into Israel, marking Tehran’s first direct attack on Israeli territory. While no one was killed, as Israel and its allies intercepted most of the projectiles, the attack nevertheless fed global fears of escalating conflict in the Middle East. Iranian leaders said the strike was retaliation for the alleged Israeli bombing of Iran’s embassy in Syria, where seven IRGC commanders were killed earlier that month.

What is the IRGC’s domestic role?

The IRGC has also become a central player in Iran’s domestic politics, evolving into what CFR’s Ray Takeyh has called the most important organization in the country. After gaining power as a counterweight to the 1997–2005 presidency of Mohammad Khatami, a reformist, the number of former IRGC personnel in politics grew further during the first term of Khatami’s successor, Mahmoud Ahmadinejad. Supreme Leader Ali Khamenei—who led the IRGC during the Iran-Iraq War—has appointed former IRGC commanders to top political posts, and former guards in parliament tend to advocate a hard-line foreign policy, as well as support for developing a civilian nuclear program.

Because the IRGC marches in lockstep with the supreme leader’s policy positions, its powers at times seem to outshine that of Iran’s president, who does not control any of the armed forces and has relatively few powers of his own. (Only men have been president, and whether Iranian law requires this is unclear.) While the president has sway over domestic policy—he controls the national budget, for example—his influence over foreign policy is limited. “A president whose policy goals run counter to those of the supreme leader will have little ability to advance his agenda; whereas a president whose goals overlap those of the supreme leader will find broad backing for his initiatives,” says Naval Postgraduate School Professor Afshon Ostovar.

The organization’s influence is still superseded by that of Khamenei, with whom the IRGC shares a mutually beneficial relationship, experts say. Karim Sadjadpour of the Carnegie Endowment for International Peace wrote in a 2009 study [PDF] that Khamenei has developed a relationship with the IRGC that is “increasingly symbiotic, politically expedient for the Leader and economically expedient for the guards,” helping compensate for the fact that he lacks Khomeini’s authority. “He is their commander in chief and appoints their senior commanders, who, in turn, are publicly deferential to him and increasingly reap benefits by playing a more active role in political decision making and economic activity,” wrote Sadjadpour.

In 2007, the Basij was brought under the direct command of the IRGC, a reorganization some analysts attributed to a renewed focus on perceived internal threats to the regime. In June 2009, the IRGC allegedly helped fix the presidential election in Ahmadinejad’s favor. Amid subsequent mass demonstrations alleging fraud, human rights groups documented the Basij attacking protesters. Thousands were detained, and many reformist politicians and activists imprisoned.

The 2013 presidential election was also marred by IRGC intervention. While Hassan Rouhani ultimately prevailed over hard-liners favored by many guards, reports indicated that the IRGC created an atmosphere of intimidation ahead of the vote and pressured the Guardian Council, which vets candidates for their ideological suitability, to cull candidates they deemed unacceptable. Among those disqualified was the prominent revolutionary figure Akbar Hashemi Rafsanjani, who was suspected of being too independent of Khamenei. The corps saw its political support grow with Iran’s 2020 general elections and the 2021 election of Rouhani’s successor, Ebrahim Raisi.

But experts say the IRGC’s heavy hand in politics and its continued willingness to harm Iranians make it unpopular among the public. The organization took a hit to its reputation after it mistakenly shot down a passenger plane flying over Iran’s air space in January 2020, killing all 176 people on board. Most of them were Iranians. In addition, the Basij and broader IRGC have been accused of beating, shooting, sexually assaulting, and torturing Iranians participating in the “Women, Life, Freedom” anti-government protest movement that erupted in Iran in late 2022.

How deeply is the IRGC involved in Iran’s economy?

Among the political interests the guards defend is an economic empire: according to a 2020 report from the Center for Strategic and International Studies, “the IRGC has become the most powerful controller of all important economic sectors across Iran.” The IRGC first became an economic player [PDF] when it was charged with rebuilding infrastructure destroyed in the Iran-Iraq War, and the corps has since expanded into many other industries, including banking, shipping, manufacturing, and consumer imports. Political clout secures IRGC-affiliated companies no-bid contracts from the state to service the oil sector and develop infrastructure.

These economic activities enrich IRGC officials and fund its activities, such as weapons acquisition, covert operations abroad, and Iran’s nuclear program. They also support veterans and the families of killed IRGC members. Public works projects developing Iran’s rural regions build the IRGC goodwill it lacks in urban areas and provide work for Basij volunteers. When floods devastated rural areas in western Iran in April 2019, volunteer guards took a leading role in relief efforts. In Syria, the IRGC has spearheaded Iranian reconstruction projects.

The IRGC also participates in massive black markets. Some analysts say that the spate of U.S. sanctions has benefited the IRGC at the expense of Iran’s public and broader economy; as Iranian businesses have been cut off from licit finance and trade, the IRGC has had greater black-market opportunities. With the U.S. reimposition of oil sanctions lifted under the 2015 Iran nuclear agreement, the IRGC has smuggled oil, mostly to China, and generated millions of dollars for the Quds Force and Hezbollah.

What foreign opposition does the IRGC face?

The United States and its allies are responsible for most of the international condemnation of the IRGC. While Israeli security forces regularly target IRGC-linked groups in Syria, the corps’ other opponents tend to eschew a military approach. The U.S. Treasury Department designated the Quds Force a supporter of terrorism in 2007, and it imposed further sanctions on Quds Force officials in 2011 after a failed assassination attempt on the Saudi ambassador to the United States. President Trump designated the IRGC a foreign terrorist organization (FTO) in April 2019, saying it “participates in, finances, and promotes terrorism as a tool of statecraft.” It was the first such designation of a state security agency, but the IRGC had already been heavily sanctioned. The EU has been weighing its own designation of the IRGC since early 2023. Following Iran’s unprecedented strike on Israel in April 2024, Israeli officials have urged the EU and other governments to follow the United States’ lead and impose terrorist designations on the IRGC.

Recommended Resources

In Foreign Affairs, the Brookings Institution’s Suzanne Maloney explains how Iran and the IRGC are capitalizing on the chaos of the latest Israel-Hamas war.

A CFR infographic illustrates competing centers of decision-making in Iran’s government.

CFR’s Ray Takeyh explains the role of Iran’s supreme leader.

This article discusses Iran’s relationships with allies throughout the Middle East.

Naval Postgraduate School Professor Afshon Ostovar traces the history of the IRGC in his book Vanguard of the Imam: Religion, Politics, and Iran’s Revolutionary Guards.

Will Rampe and Sara Ibrahim contributed to this Backgrounder. Will Merrow and Michael Bricknell created the graphics.

For media inquiries on this topic, please reach out to [email protected].

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