Andie Parry, Johanna Moore, Carolyn Moorman, Ria Reddy, Ben Rezaei, and Nicholas Carl

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The Israel Defense Forces (IDF) conducted three waves of strikes into Iran on October 25.The strikes were in response to the large-scale ballistic missile attack that Iran launched against Israel on October 1. The IDF targeted around 20 locations around Tehran and western Iran, including vital air defense assets and facilities tied to the Iranian drone and missile programs. The IDF in particular struck four S-300 air defense batteries, which are Russian-made and the most advanced air defense system that Iran operates. That the IDF hit these batteries highlights the relative vulnerabilities of the S-300, especially against advanced platforms like the F-35 fighter jet. The IDF separately struck prominent defense industrial sites, such as the Parchin and Khojir complexes outside Tehran. These complexes are managed by the Islamic Revolutionary Guards Corps (IRGC) and Defense and Armed Forces Logistics Ministry. The regime uses these facilities to develop and manufacture advanced weapons systems, including solid-propellant ballistic missiles. Iran has used the Parchin complex previously for high explosives testing in support of its nuclear weapons program. International inspectors found traces of uranium there in 2015, indicating that a larger quantity of uranium was there at some point, despite Iranian officials denying that the complex was involved in nuclear activities. Although there are no known nuclear activities currently at the Parchin and Khojir complexes, the IDF strikes could impede Iranian progress toward a nuclear weapon, given the role that these complexes could play in building a delivery system.

The IDF strikes could also disrupt the Iranian ability to build missiles and send some to its partners, such as Russia, Lebanese Hezbollah, and the Houthis. Three unspecified Israeli sources told Axios that the IDF targeted sophisticated mixing equipment used to make solid fuel for advanced ballistic missiles, such as those that Tehran has used to attack Israel directly. Commercially available satellite imagery confirmed that the IDF destroyed several buildings at the Parchin and Khojir complexes. The imagery shows no signs of secondary explosions, which is consistent with the IDF targeting industrial mixers rather than weapons storage facilities. The IDF strike on the Khojir complex comes after the regime began expanding the facilities there in August 2023 in order to increase the Iranian capacity to build missiles. The Israeli sources speaking to Axios said that Iran will need to buy new mixers from China. Doing so could take months or possibly a year or more, hampering the Iranian ability to replenish its missile stockpiles and those of its allies in the Axis of Resistance.

The IDF struck several locations in Iraq and Syria immediately before launching strikes into Iran. The IDF was likely targeting early warning radars and sensors that would have given Iran advanced notice of the incoming Israeli attack. Iran has in recent years worked to build an early detection network across Iraq, Syria, and Lebanon in order to better defend against Israeli airstrikes.

Iranian officials and state media have downplayed the amount of damage that the IDF inflicted. The regime boasted that it prevented IDF aircraft from entering Iranian airspace and that the strikes caused only limited damage. The strikes did kill four Artesh officers, however, presumably at the air defense sites that the IDF struck. The Iranian Foreign Affairs Ministry responded to the IDF strikes saying that Iran has the ”right and duty to defend itself against foreign acts of aggression.”

Key Takeaways:

• Iran: The IDF conducted three waves of strikes in Iran targeting air defenses and facilities tied to the Iranian drone and missile programs. These strikes could disrupt the Iranian ability to build missiles and send some to its partners, such as Russia, Lebanese Hezbollah, and the Houthis.

• Saudi Arabia: A new Iranian-backed militia claiming to operate in Saudi Arabia announced its existence. The Islamic Resistance in the Land of the Two Holy Mosques claimed that it fired a drone toward Israel.

• Lebanon: The IDF destroyed a large underground Lebanese Hezbollah complex in southeastern Lebanon. The location, size, sophistication, and structure of the complex suggested that it was meant for offensive operations against Israel. 

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ISW–CTP has launched an interactive map of Israeli ground operations to accompany our daily campaign assessments of the Israel–Hamas war. This product complements the daily static maps that ISW-CTP produces with high-fidelity and, where possible, street-level assessments of the war in Israel.

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