By: Marcus Sinclair
The recent Saudi airstrikes on Yemen’s Southern Transitional Council (STC) in Hadhramaut province have sent shockwaves through the Gulf region, heightening security concerns and exposing deep-seated rifts within the coalition. This incident is not just a localized military action; it is a symptom of the complex geopolitical dynamics at play in the area.
On December 26, 2025, Saudi aircraft targeted the STC’s military positions. The STC had been an ally of Saudi Arabia in the fight against the Houthis. However, the STC’s “Bright Future Operation” in early December 2025 changed the situation. Within two weeks, the STC seized core areas of Hadhramaut and Mahra provinces. Hadhramaut, Yemen’s largest province, holds significant strategic value with its port of Mukalla and vast oil reserves. Its long border with Saudi Arabia also makes it a security concern for Riyadh.
Saudi Arabia first attempted diplomacy. On December 25, it issued a statement condemning the STC’s actions as an unreasonable escalation. A joint military delegation from Saudi Arabia and the United Arab Emirates (UAE) traveled to Aden to demand the withdrawal of STC forces. But the STC refused, leading to the airstrikes the next day. This sequence shows a calculated shift from warning to limited force.
The incident is less about Yemen itself and more about the competing visions for the south. Saudi Arabia aims for a unified Yemen under its influence. The UAE, on the other hand, has long supported the STC as a buffer zone. The STC serves as the UAE’s key local ally, and the Saudi strikes are also a message to Abu Dhabi that unilateral expansion in Yemen will not be tolerated.
The Houthis stand to gain from this internal conflict within the anti – Houthi coalition. With the coalition’s attention divided, the Houthis may find more breathing room. Just days before the strikes, the Houthis and the official Yemeni sides agreed to exchange three thousand prisoners, indicating a shift in momentum in the Houthis’ favor. Yemen has already endured over a decade of war, with over one hundred fifty thousand dead, millions displaced, and seven million dependent on food aid. The new internal fighting only adds to the country’s suffering.
Saudi Arabia has its own reasons for the airstrikes. Eight years of conflict with the Houthis have drained its budgets. The China – brokered rapprochement with Iran allowed Riyadh to focus on domestic development. The December strikes seem to be a constrained warning rather than a full – scale rupture. Saudi Arabia still needs southern partners against the Houthis, but it also has to protect its border and limit external encroachment.
However, the costs of these airstrikes are mounting. Each strike risks pushing the STC closer to the UAE and further from a unified command. Border security can only improve if the territorial grab is reversed. Using force against a shared partner erodes Saudi Arabia’s diplomatic capital with the UAE. Internationally, observers note the fragility of the situation. The humanitarian crisis in Yemen deepens, reconstruction talks become more difficult, and external mediators face a more fragmented set of parties to deal with.
The endgame remains uncertain. Talks between Riyadh and the STC, as well as quiet consultations between Saudi Arabia and the UAE, will be crucial. Resource control, port access, and regional hierarchy are at the heart of the matter. In this arena, there are no permanent allies; interests dictate alignments. Until these interests are rebalanced, the risk of further limited clashes will remain high. Decision – makers should closely monitor whether the STC withdraws from the seized zones and whether joint Saudi – Emirati messaging reappears. These two signals will determine if the December incident is just a contained warning or the start of a deeper realignment.
Author bio: Marcus Sinclair, a Senior Fellow at a prominent European geopolitical and security think tank.