What Is THAAD And Why Is The U.S. Deploying It To Israel?

Two THAAD interceptors are launched, intercepting two near-simultaneous medium-range ballistic missile targets during tests in the western Pacific. (file photo)

The United States has said it will deploy an advanced antimissile system and around 100 soldiers to operate it to Israel, a key ally.

The Pentagon said on October 13 that the Terminal High Altitude Area Defense (THAAD) system will bolster Israel’s already formidable air defenses. It is unclear when the system and the U.S. soldiers will arrive in Israel.

What Is THAAD?

The THAAD is one of the most advanced and powerful antimissile systems in the U.S. arsenal.

Israel currently uses several systems developed with the United States -- the Iron Dome, David’s Sling, and Arrow -- to intercept rockets, drones, and missiles at different altitudes and distances.

The THAAD system has advanced radar, which detects missiles from longer distances. Its interceptors also have a longer range.

“It is a far superior antimissile system,” said Hossein Aryan, a Britain-based defense expert. “Its range is vastly [more] extensive” compared to Israel’s air defense systems.

Why Is The U.S. Sending THAAD To Israel?

The U.S. decision came after Iran fired around 180 ballistic missiles on Israel on October 1, an attack that some experts say exposed vulnerabilities in Israel’s air defenses.

Aryan said Iran’s attack prompted Washington to boost Israel’s antimissile defense capabilities in the event of “another potential attack from Tehran.”

Tehran’s massive missile barrage -- its biggest-ever direct attack against its archenemy -- was in response to Israel’s invasion of Lebanon and its recent assassinations of key Iranian allies in the region.

Israel downplayed the damage caused by Iran’s attack. But satellite imagery appeared to show around 30 ballistic missiles landed in and around the Nevatim air base in southern Israel. The images show damage to buildings and craters on the runway at the base.

Israel's Iron Dome antimissile system intercepts Iranian missiles on October 1.

The Nevatim base houses U.S.-made F-35 fighter planes. Experts say Iranian missiles only narrowly missed some of the fighter planes stationed in the base.

Meanwhile, one missile landed close to the headquarters of Mossad, Israel’s spy agency, in Tel Aviv, causing a deep crater.

Israel has vowed a severe response to Iran’s missile attack.

Meanwhile, a drone attack by Hezbollah, the armed group and political party that controls much of southern Lebanon, killed four Israeli soldiers in a base on October 13.

Shashank Johsi, a visiting fellow at Kings College London, said Washington is deploying the THAAD system “because it anticipates that Israel's retaliation to the recent Iranian missile barrage will be a large and significant attack.”

That, in return, is “likely to prompt yet another Iranian strike,” he said.

Joshi, who is also the defense editor of The Economist magazine, said Israel has a range of options, from striking Iranian weapons facilities to targeting its leadership or nuclear sites.

“Whichever option it chooses, Iran's leadership is likely to retaliate in force,” he said.