For communities across Asia that depend on the free flow of oil through the Strait of Hormuz, the capabilities and stated intentions of the Islamic Revolutionary Guard Corps Navy carry serious weight. The IRGCN operates as a parallel naval force to Iran’s regular navy, built specifically for asymmetric warfare in the Persian Gulf.
Any disruption to oil shipments through that strategic waterway would affect global energy prices and supply chains across Asia and beyond, making the force’s exercises and threats a matter of enduring international concern.
A Parallel Navy for Asymmetric Warfare
The Islamic Revolutionary Guard Corps was born from the upheaval of the 1979 Iranian Revolution. Ayatollah Ruhollah Khomeini ordered its creation as a counterweight to the regular military, which was seen as loyal to the former monarchy.
The new force’s constitutional mandate was to protect the Islamic Republic’s ideological integrity and prevent foreign interference. Over time, it grew from a revolutionary militia into a sprawling institution with its own ground, naval, air, and intelligence branches. The IRGC Navy, established in 1985, operates alongside Iran’s conventional navy but follows a distinct doctrine. It is often described as a guerrilla navy, relying on small fast-attack craft, anti-ship missiles, and mines rather than traditional warships.
The force also serves as Iran’s de facto coast guard, exercising primary control over the Persian Gulf and the Strait of Hormuz, a waterway that carries a large share of the world’s seaborne oil traffic. The IRGCN fields a fleet of small fast-attack craft, anti-ship cruise missiles, mines, and unmanned aerial vehicles.
Its arsenal includes the Noor and Qader anti-ship missiles, with ranges between 120 and 200 kilometers, the Khalij Fars anti-ship ballistic missile, and thousands of naval mines. The force has about 20,000 personnel and over 100 small craft. Its doctrine of asymmetric warfare relies on swarms of fast-attack boats, coastal anti-ship missiles, and naval mines to offset the conventional naval superiority of the United States and its allies.
A History of Confrontation and Expansion
The IRGCN has conducted exercises simulating closure of the Strait of Hormuz. In 2022, the force staged the “Great Prophet 17” exercise, which rehearsed blocking the strait.
Rear Admiral Alireza Tangsiri, the IRGCN’s commander, has repeatedly threatened to block the strait if Iran’s oil exports are halted. Those threats continue to echo through diplomatic channels, and the potential for a confrontation remains. In 2019, the IRGCN seized the British tanker Stena Impero in the Persian Gulf, an escalation that drew international condemnation.
The incident highlighted the force’s willingness to use its small craft and missiles against commercial shipping. That history of confrontation extends beyond military operations.
Beyond its naval role, the IRGC has expanded into nearly every sector of Iranian society and the economy. It runs businesses in energy, construction, and food production. Some news reports have described it as a business empire. The force maintains its own media arm inside Iran and operates the Quds Force, a unit that arms and trains allied militias abroad, including Hezbollah and the Houthis.
The IRGC is currently designated as a terrorist organization by many countries, including the United States and the European Union, as well as by several Arab and Western states. That designation reflects its overseas operations and its role in Iran’s ballistic missile program.
The IRGC Aerospace Force runs that program, which has grown steadily since the 1990s and now poses a concern for regional security and nonproliferation efforts.
What the IRGCN’s Growing Arsenal Means for Global Energy Security
The IRGCN’s growing arsenal of anti-ship missiles and unmanned aerial vehicles suggests it is preparing for a conflict that could directly affect the energy security of Asian nations. With Rear Admiral Tangsiri’s threats continuing to echo through diplomatic channels, the potential for a confrontation remains.
The force’s history of seizing commercial vessels and its growing arsenal of asymmetric weapons have made it a central factor in Persian Gulf security. Its influence inside Iran also shapes the country’s domestic politics and international posture, making the IRGC a subject of lasting relevance far beyond military affairs. For readers, the repeated exercises threatening to block the Strait of Hormuz matter because any disruption to oil shipments would affect global energy prices and supply chains across Asia and beyond.
The force’s parallel structure, established after the 1979 revolution, was designed to protect the Islamic Republic’s ideological integrity, but its practical effect has been to create a separate military command with the capacity to threaten one of the world’s most vital maritime chokepoints.
