The TWZ Newsletter

Weekly insights and analysis on the latest developments in military technology, strategy, and foreign policy.

Iran states it has more missiles now than it had during the 12 Day War with Israel.** **While the accuracy of that claim is questionable, experts who follow Tehran’s missile program say that the country has ramped up production in an effort to have its arsenal ready to overwhelm Israeli missile defenses, which were degraded during the war. All this comes amid growing concerns about a new conflict over Iran’s nuclear program.

“Our missile power today far surpasses that of the 12-Day War,”Iran’s Foreign Minister Abbas Araghchi recently proclaimed. “The enemy in the recent 12-day war failed to achieve all its objectives and was defeated.”

“Iran’s defense production has improved both in quantity and quality compared to before the 12-day Israeli-imposed war in June,” Brig. Gen. Aziz Nasirzadeh, the country’s defense minister, said on Monday.

Members of the Israeli security forces check the apparent remains of an Iranian ballistic missile lying on the ground on the outskirts of Qatzrin, Golan Heights, Israel, on Monday, June 23, 2025. (Photo by Michael Giladi / Middle East Images via AFP) MICHAEL GILADI

Meanwhile, Iranian officials have told Ali Vaez, the Iran project director at the International Crisis Group, that “missile factories are working 24 hours a day,” The New York Times reported. Vaez added that if there is another war, “they hope to fire 2,000 at once to overwhelm Israeli defenses, not 500 over 12 days” as they did in June. “Israel feelsthe job is unfinished and sees no reason not to resume the conflict, so Iran is doubling down preparedness for the next round.”

While “it’s not clear exactly how many missiles in a larger volley the Islamic Republic may choose to fire, there is no doubt that they may still try to find a way to overwhelm either interceptors or dependent sites with a greater number of projectiles fired at once,” Vaez added.

Missiles fired from Iran are seen streaking across the skies over the city of Ramallah in the West Bank on June 19, 2025. (Photo by Issam Rimawi/Anadolu via Getty Images) Anadolu

In addition to increasing the number of missiles it is producing, Iran is also applying lessons learned from the 12-Day War to improve their effectiveness, Behnam Ben Taleblu, a senior fellow at the Foundation for Defense of Democracies (FDD) think tank, told TWZ.

“The Islamic Republic also learned how to fire less and get more bang for your buck based on the targets and based on the location and based on the firing sequence, or the launch formula, that the regime employed when it fired for some bases that were further east in Iran during the 12-Day War,” he explained. “There is no doubt the regime wants to improve the lethality of its missile force. It certainly has learned a lot between Operation True Promise One, True Promise Two and True Promise Three.”

During the conflict, Iran claimed it used what it calls the Fattah-1 medium-range ballistic missile (MRBM). Authorities in Iran explicitly touted those, the Haj Qassem and Kheibar Shekan, as offering high terminal maneuverability and/or high speeds specifically intended to reduce their vulnerability to missile defense interceptors. You can see videos claiming to show Fattah-1 missiles hitting Israel.

🚨 BREAKING:

Iran’s IRGC confirms the first-ever use of the Fattah-1 hypersonic missile in a strike on Tel Aviv.

With Mach 13-15 speed and a 1,400 km range, it reached the target in under 5 minutes, maneuvering both inside and outside the atmosphere. pic.twitter.com/Oc3DyvdrUq

— Defence Index (@Defence_Index) June 18, 2025

While it is unclear exactly what mix of new missiles Iran is building, increasing the production of higher-speed, more survivable ones would be a problem for Israel, given their increased ability to pierce missile defenses.

Improving the overall effectiveness of their ballistic missile barrages is clearly a top priority for Tehran, just as defending against future attacks is for Israel. As we previously noted, Iran launched 631 missiles during the 12-Day War, of which 500 reached Israel, according to assertions made by the Israel Defense Forces (IDF). Of those missiles that did land on Israeli soil, 243 hit open areas, requiring no air defense response. A total of 36 missiles hit populated areas, while 221 missiles were intercepted. That represented an 86% success rate, the Israeli analysis claimed. We cannot independently verify the details provided by Israel.

Civilians retrieve personal belongings from the rubble of their house after a ballistic missile fired from Iran struck Tel Aviv on June 23, 2025. (Photo by Amir Levy/Getty Images) Amir Levy

Still, having to fire so many interceptors placed a huge strain on Israel’s vaunted integrated air and missile defense system (IADS), according to several published reports, which the IDF denied. TheU.S. expended many advanced interceptors during the onslaught, as well.

“U.S. and Israeli defenses were stretched thin and vast numbers of interceptors were needed to defend against Iran’s ragged retaliation,” the Foreign Policy Research Institute concluded.

Beyond interceptions, Israel managed to destroy a significant number of Iran’s launchers during its aerial interdiction campaign over Iran, as well as temporarily blocking or destroying missile storage sites, and disrupting command and control of Iranian missile forces during the war, greatly reducing Tehran’s ability to get off shots. It is unknown how many missiles were destroyed on the ground during the war and how many were left untouched.

“Iran also has learned about its vulnerabilities, and it is seeking to build back better, as safely as possible,” Taleblu suggested. “But the rate and the speed at which it rebuilds, probably in the short term, may outpace the rate and the speed at which Israel is rearming to defend itself.”

We detailed the overall battle of attrition between Iranian standoff weapons and Israeli (and U.S.) air defenses during the war. What is happening after the conflict is part of a broader issue with missile defense — the enemy can, and usually does, seek to outproduce the defensive capacity of the missile shield, and usually can at a lower comparative cost.

You can read more about Israel’s IADS in our deep dive here.

An Israeli Air defense system intercepts a ballistic missile barrage launched from Iran to central Israel during the missile attack. (Photo by Eli Basri/SOPA Images/LightRocket via Getty Images) SOPA Images

Iranian officials say concerns about their missiles, as well as their nuclear energy program, are being used as a pretext for possible future attacks.

“What does this issue have to do with the West that it feels entitled to comment on the range of Iran’s missiles?” Secretary of the Supreme National Security Council Ali Larijani rhetorically asked on Monday. “No country has the right to interfere in the independent defensive capabilities of another nation.”

As it works to rebuild its missile arsenal, Iran is getting help from China.

“European intelligence sources say several shipments of sodium perchlorate, the main precursor in the production of the solid propellant that powers Iran’s mid-range conventional missiles, have arrived from China to the Iranian port of Bandar Abbas,” CNN reported late last month.

Bandar Abbas (Google Earth)

The shipments, containing some 2,000 tons of sodium perchlorate, began arriving on Sept. 29, the cable network explained. They were bought by Iran from Chinese suppliers in the wake of the war.

“The purchases are believed to be part of a determined effort to rebuild the Islamic Republic’s depleted missile stocks,” the news outlet added. “Several of the cargo ships and Chinese entities involved are under sanctions from the United States.”

“China is appearing to play a key role here by providing precursor chemicals that do go into solid propellant, rocket fuel, and oxidizer,” Taleblu observed.

Beyond assisting Iran’s offensive missile capabilities, China is reportedly considering a deal to give Tehran advanced HQ-9 air defense systems to help make up for those destroyed by Israel during the 12-Day War. While Iran’s long-range weapons arsenal are often the focus, rebuilding the country’s air defenses is also clearly a top priority after Israel quickly obtained air supremacy over the country.

Military vehicles transport HQ-9C anti-aircraft missiles past Tiananmen Square during V-Day military parade to commemorate the 80th anniversary of the victory over Japan in WWII. (Photo by Sheng Jiapeng/China News Service/VCG via Getty Images) China News Service

The issue of new Iranian missile production comes against the backdrop of concerns that Tehran has developed a new facility to continue what U.S. officials claim is its nuclear weapons ambitions. The U.S. says it destroyed a great deal of Iran’s ability to develop nuclear weapons during June’s Operation Midnight Hammer, in which U.S. Air Force B-2 Spirit stealth bombers dropped 14 30,000-pound GBU-57/B Massive Ordnance Penetrator (MOP) bunker buster bombs on Iran’s Fordow and Natanz nuclear facilities.** A U.S. nuclear-powered, guided missile (SSGN) **submarine in the Central Command Area of Responsibility launched more than two dozen Tomahawk land attack cruise missiles against key surface infrastructure targets at Isfahan, officials added.

A B-2 bomber drops a GBU-57/B Massive Ordnance Penetrator (MOP) bunker buster bomb during a test. (USAF) USAF

However, as The New York Times noted, Iran “appears to be continuing to work on a new enrichment site known as Pickaxe Mountain. It has refused to give international inspectors access to that site or any other suspected nuclear sites other than those already declared.”

The result “is a dangerous stalemate — with no negotiations, no certainty over Iran’s stockpile, no independent oversight,” the newspaper explained. “And many in the Gulf believe that makes another Israeli attack on Iran almost inevitable, given Israeli officials’ long-held view that Iran’s nuclear program is an existential threat.”

The pace of Iran’s missile development could be a large factor for the timing of any future conflict with Israel, Taleblu told us.

“There is a race to build back better. For Israel, it’s interceptors. For the Islamic Republic of Iran, it’s medium-range ballistic missiles,” Taleblu posited. “The fuzzy math between the two may determine the time when the next round between Israel and Iran takes place.”

Contact the author: howard@thewarzone.com