Iran and Allies Tighten Grip on Key Middle East Shipping Lanes

Houthi rebels in Yemen have seized the strategic Mayun Island in the Bab el-Mandeb Strait, a vital waterway connecting the Red Sea to the Gulf of Aden and the Indian Ocean. This move, reported by a Yemeni government official, consolidates the rebels' control over key points on the Yemeni side of the strait, which is crucial for international maritime trade.

While this does not grant Iran direct control over the strait, it positions Tehran and its Houthi allies to threaten two of the world's most important shipping lanes simultaneously: the Strait of Hormuz, controlled by Iran, and the Bab el-Mandeb, now significantly influenced by the Houthis. The island's location allows for surveillance of ship movements, deployment of radar and observation systems, and direct threats via missiles and drones, potentially disrupting traffic and increasing risks for commercial and military vessels.

The Houthi advance follows rapid gains along Yemen's western coast, including the capture of the port city of Mokha and expansion in the Hanish Islands. Control of Mayun and the opposite D'hubab area is considered key to dominating the entire strait. This development is particularly concerning for Saudi Arabia, which has increased oil shipments via pipelines to the Red Sea port of Yanbu, with oil then transiting Bab el-Mandeb to Asian markets. This route is now within direct Houthi range.

The Houthis have declared a naval blockade against Saudi Arabia and have attacked tankers and energy facilities. While the Houthis claim to protect international shipping and target only "defined objectives," and state that all vessels except Saudi ones can pass safely, past incidents suggest the ability to selectively allow passage can deter shipping companies, raise insurance costs, and force longer, more expensive routes around the Cape of Good Hope. Shipping volume through Bab el-Mandeb has reportedly already decreased by approximately 60% since late 2023.

These developments intensify fears that the Yemeni front has become another arena in the broader conflict between Iran and the United States. Iranian and regional sources suggest Tehran has directed the Houthis to escalate attacks on Saudi Arabia, promising increased funding and weapons, and deploying Revolutionary Guard commanders to assist in coordinating operations. Iran denies direct control over the Houthis, but the strategic outcome is clear: Iran holds sway over Hormuz, and the Houthis now influence Bab el-Mandeb, placing Saudi Arabia, the world's largest oil exporter, between two maritime chokepoints under threat from Tehran and its allies.