The Saudi-Emirati partnership that once anchored the war effort in Yemen is fracturing after a deadly attack on Emirati-linked ships at the port of Mukalla in Hadramaut province. Riyadh has accused Abu Dhabi of endangering Saudi security and issued a stark ultimatum demanding the withdrawal of all UAE forces from Yemen within 24 hours, along with an end to Emirati support for southern separatists. The confrontation marks the most serious rupture between the two Gulf monarchies since their joint intervention in Yemen began in 2015.
The fallout carries implications far beyond Yemen’s borders. Any escalation between Saudi Arabia and the UAE risks destabilizing critical maritime corridors linking the Persian Gulf and the Gulf of Aden, through which much of the world’s energy supply transits. Such a clash would come as the United States struggles to contain Houthi attacks on Red Sea shipping, further eroding Western influence over regional security. Analysts warn that even limited confrontation could send shockwaves through global oil markets, driving prices sharply higher in a manner reminiscent of the 2017 blockade of Qatar.
Inside Yemen, the consequences are likely to be severe. Hadramaut’s population now finds itself at the center of an emerging proxy struggle, compounding an already dire humanitarian crisis. While civilians brace for renewed instability, the Houthis in Sana’a appear to benefit strategically from the discord. Long targeted by a unified Saudi-UAE front, the movement now watches its former adversaries turn on each other, easing pressure on its own military and political position.
The country itself remains deeply fragmented. The Houthis control most of western Yemen, including the capital, and govern the bulk of the population. The Saudi-backed Internationally Recognized Government holds parts of central and eastern Yemen from its base in Marib, relying heavily on Riyadh for survival. In the south, the UAE-backed Southern Transitional Council dominates Aden and surrounding provinces, pushing for independence and expanding eastward. The island of Socotra, formally under southern separatist authority, is effectively administered by the UAE and has emerged as one of Yemen’s rare pockets of stability.
Abu Dhabi has rejected Saudi accusations, denying that it pressured Yemeni factions to undermine Saudi security. Emirati officials say their presence in Yemen is focused on counterterrorism, restoring legitimacy, and protecting civilians, while reaffirming their commitment to Saudi sovereignty and regional coordination. The UAE has expressed surprise at the targeting of vehicles at Mukalla port and insists that the shipment struck by Saudi forces was intended for Emirati troops. While signaling a willingness to withdraw counterterrorism forces, Abu Dhabi has emphasized de-escalation and restraint.
The Southern Transitional Council, however, has openly defied the Saudi-backed Presidential Leadership Council’s ultimatum. In a statement, the STC rejected what it called unilateral decisions that risk plunging Yemen into new confrontations and undermining the Arab coalition, praising the UAE as a key partner against the Houthis. The standoff follows a series of rapid STC offensives in December that left the group controlling most of the former South Yemen’s population centers and a large share of the country’s oil reserves.
Saudi Arabia’s response included airstrikes on Mukalla on December 30, after Riyadh was forced to withdraw from Aden. For now, the Houthis appear content to remain on the sidelines, consolidating control over the north while their rivals fracture. As the Saudi-UAE rift deepens, regional actors such as Pakistan, bound to Riyadh by a recent defense pact, face difficult choices about where loyalties lie if tensions escalate further. What began as a local port incident now threatens to reshape alliances, energy markets, and the future trajectory of the Yemen war itself.
