The Hidden Costs of Iran's Regional Leverage and Maritime Escalation

A battle tank advances during ongoing fighting between Iran-backed Houthi and Saudi-backed Yemeni government forces along the frontlines in al-Kadha, west of Taiz in western Yemen, on September 16, 2026. For more than two years, the 2023 Beijing-brokered agreement between Saudi Arabia and Iran seemed to mark a shift in Gulf politics: Away from confrontation and towards managed coexistence. The agreement neither ended strategic rivalry nor sought to do so, but it created political space for competition to be managed without repeatedly spilling into direct regional escalation.

That space came under severe strain earlier this year, when direct Iranian attacks on Saudi Arabia led Riyadh to expel Iran’s military attache and four other embassy staff. Renewed Houthi attacks on Saudi territory and the postponement of planned talks in Oman are now placing what remains of that diplomatic framework under further strain, exposing a deeper contradiction in Tehran’s regional strategy.

On September 8, the Houthis launched a coordinated wave of drone and ballistic missile attacks against several Saudi cities and strategic sites, including Abha, Khamis Mushait, Jizan and Najran. This escalation coincided with renewed fighting around Bab al-Mandeb, one of the region’s most strategically important maritime chokepoints, producing serious humanitarian consequences and displacing tens of thousands within Yemen and across the Red Sea to Djibouti.

Since Israel and the United States launched their war on Iran in February, Tehran has severely restricted shipping through the Strait of Hormuz, increasing the importance of Saudi Arabia’s western export routes and Bab al-Mandeb. The postponement of Oman-hosted talks in Salalah, intended to discuss maritime security measures, further demonstrates how quickly military escalation can constrict political space for diplomacy.

For Iran, relying on regional pressure as a wartime source of leverage carries a substantial strategic risk, potentially eroding the trust needed for long-term stability and regional order.