The Collapse of Yemen: How the STC is Forging the State of South Arabia

Look at a map of Yemen from December 1, 2025, and you will find that it has gone horribly out of date. Over the course of the last two weeks, a separatist organization called the Southern Transitional Council has carried out a lightning offensive, taking over Yemen’s oil fields, its entire southern coastline, and the vast majority of its overall territory. Their objective is to build a new sovereign state, to take over the territory that once made up the Cold War-era communist state of South Yemen, and to remake it in their own image. Yemen’s internationally recognized government has been powerless to resist, and although the country’s Houthi rebels have not yet gotten heavily involved in the fighting, it is clear that their leaders understand their situation has changed very quickly.

The Collapse of the Tripartite Divide and the STC Offensive

Most of the time, when an upstart bunch of rebels takes over a patch of territory and claims that they are forming a new nation, the vast majority of the world tends to either regard them as a new security threat, or to simply treat them with disdain. After all, the world is not a welcoming place to new nations, and only three new countries have gained sovereignty since the turn of the twenty-first century: Timor-Leste, Montenegro, and, most recently, South Sudan in 2011. However, world nations are giving stronger and stronger indications that this time might be different, and Yemen’s rising rebel faction is working to prove that it is not just another upstart, but a genuine global partner.

When Yemen’s Southern Transitional Council, or STC, started their offensive on the second of December, they were not expected to achieve even a fraction of the success that they did. Prior to the start of this month, Yemen was neatly divided into thirds, between a trio of landholding governments that each appeared to be roughly as strong as the others. The STC controlled a large part of Yemen’s south, leaning on the support of a high-powered fighting faction called the Hadhrami Elite Forces, and enjoying the international support of the United Arab Emirates.

The internationally recognized Republic of Yemen controlled most of the country’s eastern inland region, including its lucrative oil fields. This government was supported by Saudi Arabia, which also backed a network of allied tribal groups that generally operated in alignment with the Republic. Finally, there is the Houthi rebel organization, currently in command of Yemen’s western coastline on the Red Sea, as well as the most densely populated parts of Yemen overall.

The Houthis are backed by the nation of Iran, which treats them as a proxy force similar to Hamas or Hezbollah. The STC just shocked the world, demonstrating a far greater ability to challenge the Saudi-backed Republic of Yemen than previously realized. With the help of Emirati-supplied armored vehicles and artillery, and with the benefit of non-aggression agreements forged with those Saudi-backed tribal militias, the STC was able to run through the Republic of Yemen’s attempts at resistance.

They rapidly took over the massive province of Hadhramaut and its oil fields, as well as the entire border with Oman, more than half the border with Saudi Arabia, and all the other territory that used to belong to the nation of South Yemen from 1967 through unification in 1990.

The Republic of Yemen’s Retreat and New Regional Dynamics

The STC also solidified its control over the vital port city of Aden, where the organization had mostly been in control already, but where Republic of Yemen officials and Saudi military advisors had previously been allowed to maintain a seat of government. The STC’s hold over the former territories of South Yemen appears to be secure, meaning that they have achieved the military objectives they have been trying to accomplish for several years. While they are still engaged in follow-on offensives, it currently appears as if the Republic of Yemen government has decided to capitulate.

The Republic of Yemen remains in control of a couple of key cities, including Ma’rib and the besieged city of Taiz, plus some of Yemen’s coastal islands and a relatively empty part of the northwest that the STC does not lay claim to. The Republic of Yemen’s main backer, Saudi Arabia, does not appear to be trying to reclaim any of its standing against the United Arab Emirates, with which it has been engaged in a quiet proxy contest in Yemen for years. Instead, Riyadh appears to have accepted that it has lost this round, and is now trying to mitigate any damage.

Republic of Yemen officials have now been resettled, and those Saudi-backed militias have entered into longer-lasting non-aggression arrangements with the STC. Consequently, the Saudis and the Emiratis are on the ground in Yemen, working jointly to ensure that there is no further trouble in the areas that the STC controls. Although the STC’s territorial conquests are undeniably an important geopolitical shift, the broader implications center on the future of the region’s geopolitical structure.

Before too long, one of two things is likely to happen for the STC: either it sees its claim for sovereignty recognized on the global stage, evolving into the so-called State of South Arabia, or, if global powers become deeply engaged in the transition, they might attempt to hand the STC control of all of Yemen. The question of how that would happen, or why global powers might be eager to assist, requires a closer look at who the STC actually are as a governing and fighting force.

Contrast and Conduct: The STC in the Middle Eastern Geopolitical Landscape

To understand the trajectory of the STC, it is necessary to contrast them with other non-state actors that the United Arab Emirates have decided to support across the Middle East and North Africa. In Sudan, the paramilitary Rapid Support Forces (RSF) have gained a reputation for committing heinous atrocities, targeting civilians indiscriminately, and carrying out an ongoing genocide in the Darfur region. In Libya, a breakaway government under the command of warlord Khalifa Haftar spent six and a half years tearing the nation apart through a civil war.

Its leader has been accused of human trafficking, routinely allowing his forces to torture and execute people, and slaughtering prisoners of war. In Somalia, the Emirates support the autonomous region of Puntland, where government forces are frequently accused of the torture and abuse of detainees. They also back the breakaway region of Somaliland, where a once-promising, stable democracy has become increasingly authoritarian.

The Southern Transitional Council and its forces are not without significant faults; in past years, they have engaged in their own extrajudicial killings, forced disappearances, torture, war looting, and other war crimes and atrocities. But unlike the RSF or the forces of Khalifa Haftar, the international community has not paid significant attention to the STC’s actions. Those actions remain horrific and constitute a tragedy for the victims, but those atrocities will not necessarily matter to other global powers if the STC can keep its current image clean.

Furthermore, it appears that the STC was able to capture its new territory without engaging in a fresh wave of atrocities. While there have been a few dozen reported deaths thus far, the STC’s ratio of territory captured versus blood spilled has been genuinely impressive. Regarding their leadership on their own territory prior to this lightning offensive, the STC was not flawless—especially toward tribal groups they opposed.

However, they have generally been able to provide local stability, ensure access to basic public services, and otherwise manage the bare minimum of civilian governance, even in a part of Yemen that has been severely ravaged by disease and food shortages. From the perspective of international diplomats monitoring the Middle East, the STC represents a rebel group that won its territory by conquest and carries an ugly past, but compared to the Islamic State’s attempt to build a caliphate, the Donetsk and Luhansk People’s Republics’ decade-long proxy war, or the genocidal RSF attempting to partition Sudan, the STC presents a relatively stable alternative.

The Houthi Menace and the West’s Search for a Counterweight

Solidifying a sovereignty claim is highly complex, requiring far more than mild approval from international observers; otherwise, regions like Somaliland or Kurdistan would likely have become recognized nations long ago. Over the last few weeks, it has become clear that the STC is far from naïve about what a push for sovereignty will require. They are clearly willing to navigate diplomatic channels to make it happen, deliberately courting international audiences and selling themselves as a stabilizing force in the Middle East.

The primary aim is to convince global observers, particularly the Western world, that a sovereign State of South Arabia is mutually beneficial. The crux of their argument centers on the Houthi rebels, arguably still the most powerful faction in Yemen, but a faction that practically no nation besides Iran desires to engage with. From the shared perspective of numerous global powers, the Houthis are not just a landholding rebel group; they have positioned themselves as a persistent menace.

The Houthis have launched dozens of drone and missile attacks on shipping vessels in the economically vital Red Sea, sinking several targets and rendering the wider corridor practically unusable for commercial transit. They have intermittently attacked Israel from long range, escalating regional tensions, and have proven remarkably difficult to neutralize. A United States-led naval coalition spent many months trying to stop the Houthis with only limited success, while Israel’s recent bombing campaigns across Houthi territory do not appear to have deterred them either.

This resilience is not new. In the late 2010s, a Saudi-led military coalition was effectively pushed out of Yemen after severely underestimating the Houthi fighting capability. Given the international community’s profound struggles against the Houthis, the internationally backed Republic of Yemen was naturally overwhelmed.

At a time when global powers sought a competent fighting force to counterbalance the Houthis, the Republic of Yemen fell short. This widespread failure has become the STC’s primary strategic opportunity.

Operation Decisive and the Pathway to an Independent State

Even before they concluded their conquest of former South Yemeni territory, the STC’s leaders publicly claimed that their true target was Yemen’s Houthi-occupied capital, the city of Sana’a. Historically, this had never been a major strategic objective for the STC; their focus had remained entirely on capturing the lands necessary to establish the State of South Arabia. However, the STC is now signaling a broader ambition, backing up these new claims with direct action and maintaining their offensive momentum.

Rather than halting their advance after securing the lands of the former South Yemen, the STC launched Operation Decisive, which they describe as an anti-terrorism campaign in the province of Abyan. Operation Decisive does not target the Houthis directly; rather, it targets a network of al-Qaeda cells in the area that have long used Yemen as a base of operations. The strategic message is unmistakable: if the international community grants the STC the territory it desires and the latitude to act, the STC will actively engage in counterterrorism.

By successfully rooting out al-Qaeda cells on a short timeline, the STC proved that when in range of a global terror threat, they will neutralize it efficiently. This maneuver made the Republic of Yemen exceedingly nervous, prompting public condemnations from its leaders, while Saudi Arabia insisted that Abyan should remain free of conflict. Yet, despite having the capability to intervene, Saudi Arabia has conspicuously declined to halt the STC’s offensive.

Whether the STC would engage in a full-scale offensive war against the Houthi rebels remains nuanced. In its current state, the STC would likely struggle significantly in an offensive war. The Houthis are highly effective when fighting defensively, utilizing innovative tactics, conventional booby traps, and advanced drones.

Conversely, the Houthis would similarly struggle in an offensive campaign against the STC. It is entirely possible that neither side genuinely wants this fight. The Houthis might prefer to absorb the remnants of the Republic of Yemen and allow the STC to declare statehood, securing sole claim to the remaining territory.

The STC’s anti-Houthi rhetoric may serve primarily as a public relations campaign, but with the combined advocacy of the United Arab Emirates and Saudi Arabia, they have the attention of foreign leaders in Washington, Brussels, Moscow, and Beijing. By demonstrating basic competence, maintaining a relatively clean current operational record, and securing regional backing, the STC passes the fundamental geopolitical test for sovereignty, presenting a viable alternative in a nation that the world largely views as a failed state.

Sources

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