Houthi Missile Strikes on Riyadh Expose Saudi Vulnerability

Lethal missile strikes on Riyadh’s King Khalid International Airport over the past week have laid bare the military transformation of Yemen’s Houthi rebels, a force that has evolved from a ragtag insurgency into one of the Middle East’s most capable non-state armies. The third attack on the airport in seven days killed twelve people and wounded more than three hundred, marking a sharp escalation in a tit-for-tat conflict with Saudi Arabia, which backs Yemen’s internationally recognised government. The strikes are not isolated incidents. The Houthis have also targeted Saudi oil infrastructure, seized the Red Sea port of Mokha, and taken Perim Island in the strategic Bab al-Mandeb Strait, giving them effective control over the entrance to a waterway through which much of the world’s oil trade passes.

The group’s military rise has been a decade in the making. When the Houthis captured Sana’a in September 2014, they inherited much of the Yemeni army’s arsenal, including ballistic missiles from the Republican Guard and anti-ship weapons from the navy. They also absorbed experienced officers and missile technicians, reorganising these assets into a consolidated fighting force. Iranian support has been decisive. The Islamic Revolutionary Guard Corps and Lebanon’s Hizbollah provided training and technical expertise, while a generation of Houthi specialists travelled to Iran to sharpen their skills, particularly in anti-ship missiles and drone boats used against Red Sea shipping. The result, according to analysts, is a force that can now manufacture its signature Samad attack drones largely independently, using locally produced fibreglass and commercially sourced components, many imported from China.

The strategic significance of this capability is considerable. The Houthis announced a blockade of Saudi ports in July and have repeatedly targeted Saudi vessels attempting to transit Bab al-Mandeb, effectively strangling Saudi oil exports. Farea al-Muslimi, a Yemen expert at Chatham House, captured the prevailing underestimation of the group when he noted that the Houthis were routinely dismissed as little more than “guys in flip-flops” – until those same men can double or triple winter heating bills. The dismissive framing has obscured a more uncomfortable reality: the Houthis are not merely recipients of Iranian weaponry but increasingly self-sufficient arms producers. A decade ago they imported weapons from Africa; today they manufacture their own and, according to al-Muslimi, supply arms to the very people they once bought from.

The group’s military foundations were inherited. The capture of Sana’a delivered much of the Yemeni army’s arsenal, including Republican Guard ballistic missiles and naval anti-ship weapons, along with experienced officers and missile technicians. Iran’s Islamic Revolutionary Guard Corps and Lebanon’s Hezbollah provided training and technical expertise, and a generation of Houthi specialists has since travelled to Iran to refine their capabilities, particularly in anti-ship missiles and drone boats used against Red Sea shipping. The Houthis now produce their signature Samad attack drones largely independently, using locally manufactured fibreglass and commercially sourced components, many imported from China. More sophisticated ballistic and cruise missiles, however, remain heavily dependent on external supply lines that were cut short in recent months.

The Houthis’ effectiveness also reflects organisational strengths that outside observers have long dismissed. Farea al-Muslimi, a Yemen expert at Chatham House in London, noted that the rebels were routinely underestimated as little more than “guys in flip-flops,” yet they have spent years building their own weapons and have even begun supplying arms to the very networks they once bought from. The group’s military foundations were inherited from the Yemeni army itself, including Republican Guard ballistic missiles and naval anti-ship weapons, augmented by training from Iran’s Islamic Revolutionary Guard Corps and Lebanon’s Hezbollah. A generation of Houthi specialists has travelled to Iran to master anti-ship missiles and drone boats, and the group can now produce its signature Samad attack drones largely independently, using locally made fibreglass and commercially sourced components, many imported from China. More sophisticated ballistic and cruise missiles, however, remain heavily dependent on external supply.

The Houthis’ escalation into the Gulf conflict came in the late summer, after Saudi forces struck Sana’a airport as a Houthi delegation was travelling to Iran. That attack broke a truce that had largely held since 2022 and reignited open warfare, culminating in the Houthis’ seizure of Mokha last month. Analysts argue the group’s success reflects not only Iranian-supplied weaponry and training from the Islamic Revolutionary Guard Corps and Hezbollah, but also superior organisation and the chronic weakness of Yemen’s Saudi-backed government. The Houthis inherited much of the Yemeni army’s arsenal in 2014, including ballistic missiles and anti-ship weapons, and have since consolidated those assets under a more disciplined command. They now manufacture their signature Samad attack drones largely independently, using locally produced fibreglass and commercially sourced components, many imported from China. More sophisticated ballistic and cruise missiles, however, remain heavily dependent on external supply.

The strategic implications extend well beyond Yemen. By threatening Bab al-Mandeb and Saudi ports, the Houthis have demonstrated an ability to disrupt global energy flows and impose real economic costs on their adversaries. As one analyst put it, the rebels are no longer dismissed as “guys in flip-flops”; they can now double or triple winter heating bills. Their success reflects not only Iranian assistance but also superior organisation and the weakness of the Saudi-backed government they oppose. The Houthis have spent years manufacturing their own weapons, including the Samad attack drone, built with locally produced fibreglass and commercially sourced components, much of it imported from China. More sophisticated ballistic and cruise missiles, however, remain heavily dependent on external support, a vulnerability that will shape the next phase of the conflict.

The immediate question is whether the Saudi-led coalition can reclaim the initiative. Government forces have launched a counteroffensive to retake Mokha and Perim Island, but the Houthis have demonstrated an ability to strike deep into Saudi territory while simultaneously threatening the kingdom’s energy exports through Bab al-Mandeb. The wider lesson for the region is sobering: a non-state actor with modest resources, sustained Iranian assistance, and a decade of organisational consolidation can now threaten the capital of a major oil producer and choke a vital shipping lane. The Houthis are no longer an insurgency to be contained; they are a strategic military player whose reach extends far beyond Yemen’s borders.