In a lightning eight-day offensive that began on September 3, 2026, Houthi forces have seized control of nearly all of Yemen’s Red Sea coastline, including the shores of the Bab el-Mandeb Strait – one of the world’s most critical maritime chokepoints for global trade. The operation started with a push to sever the strategic highway connecting the Yemeni city of Taiz to the coastal port of Mokha, and by September 11, Houthi fighters had secured Mokha, the coastal town of Dhubab, and Mayyun Island, which sits directly at the strait’s entrance. Per United Nations estimates, the rapid advance has displaced over 100,000 people, many of whom have undertaken dangerous sea crossings to seek refuge in neighboring Djibouti, after the Houthis captured roughly 2,100 square miles of territory. This territorial shift marks the most significant change to Yemen’s frontlines since a UN-brokered truce froze conflict lines in April 2022, ending years of stalemate.
Most international analysis has framed the offensive as a new strategic tool for Iran – the Houthis’ key regional patron – to increase pressure on the United States and raise fresh threats to Saudi Arabia and global commercial shipping. While this framing is not inaccurate, it overlooks deeper, underreported drivers rooted in Yemen’s own domestic politics and the Houthis’ ongoing quest for domestic legitimacy.
To understand why the Houthis launched this attack now, it is necessary to revisit the timeline of Yemen’s decade-long civil conflict. The war entered its current phase in 2014, when the Houthi movement seized the capital Sanaa from the increasingly unpopular administration of President Abdrabbuh Mansur Hadi. A Saudi-led coalition intervened the following year to restore the internationally recognized government, triggering a decade of widespread destruction and famine that left the already impoverished nation in ruins. Since 2022, however, the conflict has been largely stalemated: the Houthis control most of northwest Yemen, while Saudi-backed government forces hold sway over large swathes of the south and east.
Houthi military spokesperson Yahya Saree has framed the offensive as a direct response to years of Saudi military aggression and the ongoing blockade of Houthi-held territory. This grievance is not fabricated: UN agencies have repeatedly documented the severe humanitarian damage caused by coalition restrictions on access to Yemeni ports and airspace throughout the conflict. The Houthis also trace the collapse of the informal truce to a July 13, 2026, strike on Sanaa International Airport’s main runway, carried out by Yemeni government forces with Saudi air support. The attack forced an Iranian aircraft carrying senior officers of the Islamic Revolutionary Guard Corps (IRGC) to divert mid-flight, prompting the Houthis to declare their ceasefire with Saudi Arabia over that same day. Within hours, they launched a missile strike on Abha International Airport in southern Saudi Arabia, announced a naval blockade of Red Sea shipping one week later, and opened a sustained missile campaign in early August, weeks before the September 3 ground offensive.
But analysts argue the coordinated ground campaign and seizure of Bab el-Mandeb’s strategic islands cannot be dismissed as mere retaliation for a single airstrike. Multiple interconnected, deliberate strategic calculations underpinned the move.
First, Iran’s own regional maneuvering created a unique opening. After Iran closed the Strait of Hormuz – another critical global energy chokepoint – in March 2026, following joint U.S.-Israeli strikes on Iranian targets, Saudi Arabia rerouted roughly eight times more crude oil exports through the Bab el-Mandeb Strait than it did in 2025. Houthi control of the strait gives Iran a second strategic chokehold that mirrors the leverage it holds over Hormuz. Yemeni security sources have also confirmed that a senior IRGC commander, Abdul Reza Shahlai, was deployed on the ground to oversee parts of the September operation. For the Houthis, the move also carries clear economic incentives: since closing Hormuz, Iran has charged commercial vessels up to $2 million per ship for safe passage through the strait, and the Houthis are widely believed to be seeking similar economic leverage to shore up their war-battered movement.
The most impactful domestic driver, however, is the Houthi calculation that conditions on the ground had become uniquely favorable for an offensive. Their fractured opposition in southern Yemen has grown even more divided after a 2025 diplomatic rift between Saudi Arabia and the United Arab Emirates led the UAE to withdraw all support for anti-Houthi militias in the south, leaving coastal government forces exposed. With the broader Middle East engulfed in multiple concurrent conflicts and Saudi Arabia focused on other regional priorities, the Houthis saw a window to act.
Crucially, the Houthis have framed the Bab el-Mandeb operation as a sovereign, national Yemeni action rather than a proxy move for Iran, with senior officials repeatedly rejecting claims they are merely an extension of Tehran’s regional agenda. The movement’s core goal has always been securing power within Yemen itself. As recently as 2023, Saudi Arabia and the Houthis were negotiating a comprehensive national ceasefire that would have ended Saudi restrictions and sanctions on Houthi rule, but talks collapsed after the 2023-2024 Red Sea crisis, when the Houthis ramped up attacks on commercial shipping in protest of Israel’s military campaign in Gaza. Riyadh has since shown no urgency to revive diplomatic negotiations.
The Houthis’ bet is that escalating the conflict on Yemeni ground – where any further conflict carries massive strategic and economic costs for Saudi Arabia – is the most reliable way to force Riyadh back to the negotiating table. This time, the movement calculates it holds enough leverage to secure the formal political recognition it has long sought, rather than settling for just the limited economic concessions Saudi Arabia was willing to offer in 2023.
Despite these rapid military gains, the offensive carries severe long-term risks for the Houthi movement that could undermine their core goal of securing domestic legitimacy. Throughout modern Yemeni history, no governing authority has ever managed to maintain full military and political control over the entire country. While the Houthis hold unrivaled military power across most of northwest Yemen, they have never pursued a broad inclusive political bargain with the internationally recognized government or other Yemeni political factions, prioritizing exclusive military control over power-sharing.
The group has taken tentative steps to consolidate popular support in newly captured territories: Houthi-affiliated media confirms that within days of seizing Mokha, the group reopened the port’s customs office, cut port fees and customs duties by up to 50%, distributed 20,000 food baskets to local residents across the coastal region, and offered a general amnesty to anti-Houthi fighters who surrendered control of the coast. Houthi leader Abdulmalik al-Houthi has also directly addressed southern Yemeni communities, clarifying that his forces only target Saudi-backed troops, not local residents.
But analysts characterize these moves as performative legitimacy-building, more public relations than substantive policy reform, and fall far short of the inclusive political bargain needed to unify Yemen. A decade of Houthi rule in Sanaa has demonstrated the movement has little interest in power-sharing, with a long-standing pattern of ruling through military force rather than broad political coalition.
More broadly, controlling the Bab el-Mandeb Strait and restricting Saudi shipping through the waterway reinforces the narrative – both across much of the world and within large parts of Yemen – that the Houthis remain an instrument of Iranian regional policy, regardless of their stated domestic objectives. The offensive also almost guarantees a forceful response from Houthi enemies, which could erode the movement’s newly gained military advantages. Saudi Arabia, which has already waged a decade of war in Yemen at enormous cost to Yemeni civilians, is unlikely to stand by. While few analysts expect Saudi-backed forces to attempt to retake Sanaa by force, the Houthis’ new territorial gains expose both their own fighters and Yemeni civilians to a new wave of devastating airstrikes from the Saudi-led coalition.
In the end, the Houthi gamble carries a high risk of backfiring. Seizing territory is a far simpler task than holding it and consolidating legitimate rule. The movement may now find itself controlling a strategic chokepoint that the international community is determined to reopen, while still failing to secure the one thing control of the strait can never deliver: the consent of the Yemeni people to their rule.
