Reports Jan. 6 revealed that the Israeli military had deployed about a week earlier Iron Dome and Patriot air defense batteries around the southern city of Eilat and in other locations in the region. The reason for the deployment was apparently concerns of an attack from the Iran-backed Houthi militia in Yemen. More specifically, Israel was afraid that Iran — via its proxies — would retaliate at Israeli targets on Jan. 3, the one-year anniversary of the killing by the United States of Gen. Qasem Soleimani.

The deployment of the two systems reveals the nature and extent of Israeli concerns. We are no longer talking about a geopolitical threat of Iran expanding its influence zone, but a much more concrete danger. The Iron Dome system is generally used against rockets, and has mostly been deployed against fire from the Gaza Strip. Still, experts explain that it can also intercept small drones and cruise missiles. As for the Patriot system, it can be used against ballistic missiles and larger aircraft like fighter jets and unmanned aerial vehicles.

Facing the Iranian/Iran-proxies threat, Israel did more than deploy defense batteries in the south. Already in late December, public radio station KAN reported that an Israeli navy submarine transited into the Red Sea, passing the Suez Canal on Dec. 19, with Egyptian approval. The same week, the Americans dispatched their Navy guided-missile submarine Georgia into the Persian Gulf. Much like the Israeli submarine, Georgia did not conceal its passage, in an apparent show of force against Iran.

Over the years, Israel has followed closely on movements of countries and armed groups in the Red Sea. One important reason was guaranteeing the security of Israeli merchant ships. The second reason was fear of Iranian attempts to smuggle arms by sea. Danger could emanate from both shores of the Red Sea, either the Arab Peninsula or Africa, and from different countries. But lately, it seems that Israeli security agencies are particularly concerned over Yemen.