Yemen's Houthis Gain Strategic Ground, Threatening Saudi Arabia and Red Sea Shipping

The Houthi movement in Yemen has made significant territorial gains along the Red Sea coast, capturing key positions and islands near the Bab el-Mandeb Strait, a vital maritime chokepoint. This advance, described as a major success by Reuters, enhances the Houthis' ability to threaten global shipping and poses a heightened risk to Saudi Arabia's oil export routes.

Simultaneously, the Houthis have intensified missile and drone attacks on Saudi territory. On September 15, Saudi air defenses intercepted a Houthi drone south of Mecca, which a coalition spokesperson deemed a "red line." The Houthis have also claimed responsibility for strikes on King Khalid Air Base and, critically, on the East-West oil pipeline, which transports oil to the Red Sea. This pipeline, capable of moving approximately four million barrels of oil per day, was halted following the drone attacks, potentially impacting about 4% of global oil supply.

These developments present Saudi Arabia with a dual threat: Houthi advances on its southern flank and Iranian-linked militias in Iraq posing a danger from the northeast. Saudi-backed Yemeni forces have been unable to halt the Houthi offensive, marking a significant military setback for Riyadh after years of efforts to contain the group.

The Houthi military capabilities have grown considerably since the start of the Yemeni civil war in 2014, with the group now possessing ballistic missiles, drones, and anti-ship systems, widely believed to be supplied by Iran, despite Tehran's denials.

Following the October 2023 conflict between Israel and Hamas, the Houthis have also targeted Israel and shipping in the Red Sea. While Israel and the U.S. have conducted strikes against them, these have not neutralized the Houthi threat. The increased Houthi presence near the Bab el-Mandeb Strait now directly impacts Israel's maritime routes, including those to Eilat, creating a shared threat between Israel and Saudi Arabia.

Amidst this escalating situation, there are indications of limited cooperation between Israel and Saudi Arabia, reportedly involving intelligence sharing facilitated by U.S. Central Command to counter the Houthis. However, Saudi Arabia is also seeking broader regional support, with Crown Prince Mohammed bin Salman visiting Egypt and U.S. officials engaging with the Houthis in Oman. The Houthis have reportedly assured U.S. representatives that they do not intend to attack American or Israeli vessels.

Saudi Arabia faces a difficult choice: a large-scale military operation in Yemen would be resource-intensive with no guaranteed swift outcome, while inaction would allow the Houthis to solidify their strategic gains. The Houthi territorial expansion has transformed them from a distant missile threat to a direct danger to crucial Red Sea trade infrastructure, exposing Saudi vulnerability on multiple fronts and disrupting regional oil logistics.