THAAD
Terminal High Altitude Area Defense: the US Army's premier ballistic missile defence system, deployed to Israel and across the Gulf region.
Reference data current as of March 2026.
THAAD (Terminal High Altitude Area Defense) is a US Army ballistic missile defence system designed to intercept short-, medium-, and intermediate-range ballistic missiles in the terminal phase of flight. It uses hit-to-kill technology — destroying the incoming warhead through kinetic impact rather than explosive fragmentation. Its AN/TPY-2 radar is one of the most powerful mobile X-band sensors in existence, capable of detecting ballistic missiles at ranges approaching 1,000 km.
THAAD intercepts ballistic missiles in the terminal phase of flight — the final descent toward the target — at high altitudes that minimise ground-level blast and debris risk.
- AN/TPY-2 radar detects incoming ballistic missile during mid-course or early terminal phase at ranges up to ~1,000 km.
- Fire control system calculates intercept solution and selects the optimal engagement window.
- THAAD interceptor is launched from the 6-round canister launcher on a collision-course trajectory.
- The kinetic kill vehicle (no explosive warhead) guides itself to a direct impact with the threat, destroying it through kinetic energy.
- Intercept occurs at 40–150 km altitude — above the Arrow-2 engagement zone but below Arrow-3's space-based intercept band — providing a distinct and complementary layer.
THAAD fills the gap between Arrow-2 and Arrow-3, providing redundancy in the 40–150 km altitude band. Its AN/TPY-2 radar also serves as a critical forward sensor feeding data to the broader multinational ballistic missile defence network, including Aegis ships and Israeli Green Pine radars via Link 16.
| Aspect | Arrow-3 | Arrow-2 | THAAD |
|---|---|---|---|
| Intercept altitude | 100+ km (space) | 40–60 km | 40–150 km |
| Flight phase | Mid-course | Terminal (upper endo) | Terminal |
| Kill mechanism | Hit-to-kill | Blast-fragmentation | Hit-to-kill |
| Radar | Green Pine (L-band) | Green Pine (L-band) | AN/TPY-2 (X-band) |
| Operated by | Israel (IAF) | Israel (IAF) | US Army |
In October 2024, ahead of the anticipated Iranian response that became Round 2, the United States deployed a THAAD battery to Israel — only the second overseas THAAD deployment in history (the first being the UAE in 2019). The battery is operated by US Army soldiers on Israeli soil and represents a direct US commitment to Israeli territorial defence. Its presence significantly bolstered the high-altitude intercept capacity during Rounds 3 and 4.
- Oct 2024 First THAAD battery deployed to Israel, operated by US Army personnel. Triggered by Iranian threat signals preceding Round 2.
- Oct–Nov 2024 System declared operational in Israel during Round 2 (Oct 2024). AN/TPY-2 radar provides wide-area situational awareness across the Eastern Mediterranean.
- 2025–2026 Battery remains deployed through Rounds 3 and 4, contributing to high-altitude intercept band alongside Arrow-2 and Arrow-3.
| Location | Since | Context |
|---|---|---|
| Israel | Oct 2024 | Deployed ahead of Round 2 Iranian retaliation. US Army operated. Second-ever overseas deployment. |
| UAE | 2019 | First overseas THAAD deployment. First combat intercept Jan 2022 (Houthi BMs targeting UAE). |
| Guam | Permanent | Pacific deterrence posture against North Korean MRBM/IRBM threat. |
| South Korea | 2017 | Deployed at Seongju. Highly contested politically; remains operational. |
THAAD has a limited combat record, as the system was designed for scenarios that have historically been rare: large-scale ballistic missile salvos against defended assets.
- First combat intercept January 2022, UAE — Houthi ballistic missile attack on Abu Dhabi. Marked THAAD's first operational engagement.
- Rounds 3–4 (Israel) Specific intercept details classified. System believed to have contributed to high-altitude engagements against Iranian MRBMs, complementing Arrow-2 and Arrow-3.
- AN/TPY-2 role Radar confirmed as a critical sensor node, feeding track data to Israeli and Aegis systems via Link 16 for shoot-look-shoot engagement sequences.
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