From Massive Arsenal to Recent Long-Range Tests

WASHINGTON — Iran’s ballistic missile program, long the backbone of its military deterrence, has undergone intense scrutiny and degradation in the 2026 conflict with Israel and the United States. Once estimated at more than 3,000 missiles, the arsenal has been significantly reduced by joint strikes, yet Tehran continues to demonstrate range and resilience with recent launches testing assumptions about its capabilities.

Here are 10 essential things to know about Iran’s ballistic missiles as of late March 2026:

1. Iran possesses the largest ballistic missile arsenal in the Middle East, though heavy losses have trimmed its size. Prior to escalated fighting in 2025-2026, U.S. estimates placed the inventory above 3,000 missiles, including short-range and medium-range systems. After firing hundreds in retaliatory barrages and suffering Israeli and U.S. strikes on production sites and launchers, remaining stocks are estimated between 1,000 and 2,000 operational missiles, with launchers reduced to roughly 100-200 serviceable units. Despite this, Iran has shown rapid reconstitution efforts, importing components and rebuilding facilities.
2. The program features a diverse mix of liquid- and solid-fueled missiles. Liquid-fueled systems like variants of the Shahab-3 offer longer ranges but require more preparation time. Solid-fueled missiles, such as the Sejjil and newer models like Kheibar Shekan, allow quicker “shoot-and-scoot” launches, making them harder to target. This mix enhances survivability against preemptive strikes on fixed sites.
3. Ranges traditionally capped at 2,000 km have been challenged. Iranian officials long claimed a self-imposed 2,000-kilometer limit, sufficient to reach Israel from western Iran. However, in March 2026, Iran launched two ballistic missiles targeting the U.S.-U.K. base at Diego Garcia in the Indian Ocean — more than 4,000 km away. One failed in flight; the other was intercepted. The attempt suggests modified systems or previously undisclosed capabilities that could threaten parts of Europe or further U.S. assets.
4. Hypersonic and maneuverable warheads are advancing rapidly. The Fattah-1 and Fattah-2 hypersonic glide vehicles represent a major leap, with claims of Mach 15 speeds and the ability to maneuver in pitch and yaw during re-entry. These features are designed to evade advanced defenses like Israel’s Arrow system or U.S. Patriot batteries. Iran has deployed Fattah-2 in recent strikes, showcasing improved precision and terminal-phase adjustments.
5. Key medium-range systems include the Shahab-3 family, Emad, Ghadr, Sejjil and Khorramshahr. The Shahab-3 and its variants reach 1,300-2,000 km with payloads up to 1,500 kg. The solid-fueled Sejjil offers similar range with faster launch readiness. The Khorramshahr, potentially reaching 3,000 km, carries heavy warheads suited for hardened targets. Many feature maneuverable re-entry vehicles (MaRVs) to complicate interception.
6. Short-range missiles provide regional saturation capability. Systems like the Fateh-110, Zolfaghar and Khalij Fars (anti-ship variant) cover 300-700 km, threatening U.S. bases in the Gulf, Israel’s neighbors and shipping lanes. These are often deployed in large salvos to overwhelm defenses, combined with drones for complex attacks.
7. Underground “missile cities” enhance survivability. Iran has invested heavily in deeply buried facilities and mobile transporter-erector-launchers (TELs) dispersed across the country. While Israeli strikes damaged surface infrastructure and some launch pads, many underground stockpiles and production elements survived initial waves, allowing limited continued operations.
8. The program has been heavily targeted in 2025-2026 fighting. Joint U.S.-Israeli operations destroyed an estimated 60-85% of surface-to-air missiles and a significant portion of ballistic launchers and production sites. Strikes hit facilities in Tehran, Semnan, Khuzestan and elsewhere, reducing daily launch rates by up to 90% in some phases. Production sites for solid fuel mixers and components were repeatedly hit, though Iran has begun reconstruction using alternative methods and imported materials.
9. Precision and lethality improvements focus on saturation tactics. Older missiles had limited accuracy, but newer variants with GPS-aided or inertial guidance, cluster munitions and heavier warheads aim to saturate defenses. In 2024-2025 exchanges, Iran fired hundreds of missiles in barrages, with some penetrating Israeli multi-layered defenses and causing casualties in urban areas. Recent attacks have shifted toward countervalue targets in populated zones.
10. Reconstitution and future risks remain a major concern. Despite losses, Iran is rebuilding, potentially aiming for 8,000 missiles by 2027 if unchecked, according to Israeli assessments. Imports of sodium perchlorate and other components from abroad support solid-fuel production. The program’s dual-use nature with space launch vehicles raises proliferation worries, and any nuclear breakout could pair with these delivery systems. Ongoing conflict has degraded but not eliminated the threat, with experts warning that full restoration could take 1-2 years.

Iran’s ballistic missiles serve as its primary asymmetric tool, compensating for conventional air force weaknesses. The Islamic Revolutionary Guard Corps oversees much of the program, integrating it with drone swarms for layered attacks. While U.S. and Israeli strikes have degraded launch rates and infrastructure, Tehran’s ability to fire at distant targets like Diego Garcia has upended prior range assumptions and heightened concerns for regional stability and European security.

The 2026 war has exposed both the program’s resilience and its vulnerabilities. Production facilities remain under pressure, yet underground assets and rapid repair efforts suggest Iran retains a credible deterrent. As fighting continues, the missile program’s evolution will shape the conflict’s trajectory and broader Middle East dynamics.

Analysts stress that while current stocks are diminished, the combination of hypersonic technology, dispersal tactics and reconstitution speed keeps Iran’s arsenal a potent factor. International efforts to curb components and sanctions aim to slow progress, but enforcement challenges persist.

For now, the March Diego Garcia attempt stands as a stark reminder: Iran’s ballistic missiles, even when degraded, can project power farther and with greater sophistication than many once believed. The coming months will test whether sustained pressure can prevent a full rebound or if Tehran will field an even more advanced force.