Yemen's internationally recognized government, backed by Saudi air power, retook the eastern city of Mukalla and surrounding territory in Hadramout province from UAE-backed southern separatists on Saturday. The military success prompted the government to issue a stark warning on Sunday that it would "take all necessary measures" against the Southern Transitional Council, which it accused of blockading Aden, the government's temporary capital. The STC denied imposing a blockade while simultaneously welcoming dialogue, signaling a defensive posture after its territorial losses.
The clashes represent more than infighting among ostensible allies. They expose the structural incompatibility of Saudi and Emirati objectives in Yemen—a contradiction that has transformed the anti-Houthi coalition into a proxy war within the civil war. What began as a unified front against the Iran-backed Houthis in 2015 has devolved into open military confrontation between forces loyal to competing Gulf visions for Yemen's territorial future.
The coalition was built on negative consensus
The Saudi-UAE alliance in Yemen was never grounded in shared strategic goals. It was a negative consensus: opposition to Houthi control of Sanaa and the threat this posed to Gulf security. Riyadh and Abu Dhabi mobilized together against a common enemy, but their positive visions for Yemen's post-conflict order diverged fundamentally from the outset.
For Saudi Arabia, a stable and unified Yemen remains a core national security imperative. The kingdom shares an 1,800-kilometer border with Yemen, and Riyadh cannot tolerate fragmentation that creates ungoverned spaces or rival power centers along its southern flank. A partitioned Yemen—particularly one with a southern state controlled by a UAE proxy—represents an unacceptable strategic threat to Saudi territorial integrity and regional influence.
The UAE's calculus operates on a different axis entirely. Abu Dhabi's intervention was driven by maritime ambitions: projecting power across critical Red Sea and Indian Ocean shipping lanes. Control of southern Yemeni ports—Aden, Mukalla, and the strategic island of Socotra—serves this objective far more effectively than a unified Yemeni state in which the UAE would have limited influence. A pliable southern entity, whether independent or quasi-autonomous, aligns perfectly with Emirati strategic priorities.
Members are reading: How the STC's December offensive forced Riyadh to choose between its alliance with Abu Dhabi and its core security interests.
The Houthis emerge as the primary beneficiaries
The immediate strategic consequence of this escalation is the weakening of the anti-Houthi front at a time when the Iran-backed movement still controls Yemen's most populous regions, including the capital Sanaa. Every Saudi airstrike directed at STC positions, every government unit deployed to Hadramout, represents a diversion of resources from the primary conflict that justified the intervention a decade ago.
The Houthis have demonstrated consistent ability to exploit divisions among their opponents. The 2019 clashes between government and STC forces in Aden allowed the Houthis to consolidate control in northern governorates with minimal resistance. The current escalation follows the same pattern: while Riyadh and its proxy fight Abu Dhabi and its proxy in the east and south, the Houthis face reduced pressure on their core territories. The fragmentation of the anti-Houthi coalition effectively grants the Houthis strategic breathing space to entrench their governance structures and military capabilities.
The STC's receptiveness to dialogue, despite denying the blockade accusation, suggests the separatists recognize their current vulnerability. Without direct UAE military intervention—which appears unlikely given Abu Dhabi's preference for proxy operations and its broader regional détente with Riyadh on other issues—the STC cannot withstand sustained Saudi-backed military pressure. Yet any negotiated settlement will struggle to reconcile the fundamental contradiction: Riyadh's insistence on unity versus the STC's demand for autonomy or independence.
Yemen now confronts the possibility of formalized partition, not as a negotiated political settlement but as the chaotic outcome of competing Gulf proxy wars. The coalition that was supposed to restore government authority and counter Iranian influence has instead become the mechanism for Yemen's territorial disintegration, with each Gulf power backing the fragmentation that serves its strategic interests while opposing the fragmentation that threatens them.
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