True Promise 4, launched on February 28, 2026, was the most intense missile attack Israel has ever faced. Over 200 ballistic missiles from Iran, combined with simultaneous Houthi attacks from Yemen and Hezbollah rockets from Lebanon, tested Israel's multi-layered defense system to its absolute limits.
The Attack Profile
Iran's fourth direct strike reflected lessons learned from three previous operations:
- All-ballistic composition: No slow drones that would provide early warning and allow defensive preparation
- Compressed timeline: Missiles launched in tight salvos to maximize simultaneous arrivals
- Maneuvering warheads: Emad and possibly Fattah variants with terminal guidance to complicate interception
- Multi-axis coordination: Simultaneous Houthi ballistic launches from Yemen forced southern defense assets to engage separately
- Hezbollah diversion: Heavy rocket fire from Lebanon to occupy Iron Dome and David's Sling in the north
Defense Performance
Israel's multi-layered defense, augmented by US THAAD and Aegis destroyers, engaged the incoming barrage:
| System | Role | Performance |
|---|---|---|
| Arrow-3 | Exoatmospheric intercept | Engaged high-priority MRBMs |
| Arrow-2 | Upper-atmosphere backup | Engaged Arrow-3 leakers |
| THAAD | Terminal high-altitude | US-operated, engaged MRBMs |
| David's Sling | Medium-range | Engaged SRBMs and cruise missiles |
| Patriot | Lower-tier backup | Engaged leakers and SRBMs |
| Iron Dome | Short-range | Engaged Hezbollah rockets |
The combined interception rate was reportedly 85-90% — lower than the 99% achieved in True Promise 1, reflecting the increased sophistication and volume of the attack. Several ballistic missiles struck populated areas, causing the first confirmed civilian casualties from Iranian direct fire.
Interceptor Depletion
The single greatest concern during and after True Promise 4 was interceptor depletion. Arrow-3 stocks were reportedly reduced to critically low levels. THAAD interceptors, normally held in reserve, were expended at rates that would exhaust supply within days of sustained barrage.
This created an immediate strategic vulnerability — if Iran launched a follow-on attack within days, Israel's upper-tier defenses might be significantly degraded. The US rushed additional THAAD interceptors and committed to accelerated Arrow-3 production, but neither could restore full capability immediately.
Israeli Retaliation
Israel's response was coordinated with Operation Epic Fury. Israeli Air Force F-35I Adir fighters struck targets deep inside Iran, including missile production facilities, IRGC command centers, and nuclear-related infrastructure. The strikes were conducted simultaneously with US operations, creating a combined assault that overwhelmed Iran's air defense network.
Aftermath
True Promise 4 demonstrated that Iran can cause real damage to Israel even through its formidable defenses. The combination of mass, maneuvering warheads, and multi-axis attack achieved higher penetration rates than any previous operation. But it also triggered the most devastating retaliation Iran has faced, suggesting that the escalation ladder may have reached a point where both sides face unacceptable consequences from continued escalation.