Yemen's Houthi Rebels Display Growing Military Prowess Amidst Regional Tensions

Yemen's Iran-backed Houthi rebels have recently demonstrated their expanding military capabilities through repeated strikes on Saudi Arabia's main international airport and the seizure of territory within Yemen near a crucial shipping chokepoint. These actions come despite years of interventions by Saudi Arabia, the United Arab Emirates, the United States, Britain, and Israel, which have paradoxically seen the rebels grow stronger.

Saudi Arabia has struggled to counter the latest attacks, even with superior U.S.-supplied weaponry. A senior Saudi diplomat indicated that Iran is fueling the escalation and that the Houthis rejected an offer to negotiate over the summer. The rebels operate from rugged, mountainous terrain, allowing them to disperse fighters and military assets while posing a threat to major oil facilities and key trade routes.

According to UN and other experts, Iran and its allies in Lebanon and Iraq provide the Houthis with expertise, training, and advanced weaponry. A recent report indicated that the Houthis have sought parts from Chinese suppliers to construct precision-guided ballistic missiles with a range of approximately 1,200 miles (2,000 kilometers). The Houthis already possess a wide array of ballistic missiles, cruise missiles, and drones, many resembling Iranian models, capable of reaching all Gulf states and Israel. They have also employed sophisticated anti-ship missiles and naval drones against vessels in the Red Sea, disrupting a vital trade route.

Iran denies supplying arms to the Houthis, which would contravene a UN embargo. China has not directly addressed the latest report but maintains a "prudent and responsible" stance on military exports. Smuggled Iranian weapons and parts have been intercepted from numerous shipments bound for Yemen, and a 2024 report by UN experts documented extensive military ties between the Houthis, Iran, and its allies. This report estimated the Houthi fighter numbers had grown to 350,000 by 2024, a significant increase from the 30,000 in 2015 when Saudi Arabia intervened in Yemen's civil war.

The Houthis can utilize relatively inexpensive drones and missiles to target Saudi oil infrastructure and tankers. While Iran is believed to supply advanced components like guidance systems, the Houthis are capable of manufacturing much of their weaponry domestically at a lower cost than the advanced interceptors used by Saudi Arabia. There are also suggestions they may be employing artificial intelligence to enhance their missile capabilities.

Saudi Arabia possesses a range of U.S.-supplied weapons, including advanced aircraft and missile defense systems. However, with supplies of high-end interceptors facing pressure, its ability to ward off attacks, not only from the Houthis but also from Iran-backed militias in Iraq, remains uncertain.

In recent days, the Houthis have repeatedly targeted King Khalid International Airport in Riyadh, causing flight cancellations, and have also struck the headquarters of the national oil company, Aramco. These targets are located hundreds of miles from Yemen. The disruptions have led to at least 19 fatalities, canceled school classes, and threaten Saudi Arabia's ambitious plans for economic and tourism development.

The Houthis, a Shiite movement from northern Yemen, are targeting Saudi Arabia in retaliation for its support of Yemen's internationally recognized government in the civil war. The Saudi-led coalition intervened in 2015 after the rebels seized northern Yemen. Despite years of Saudi airstrikes and ground offensives by Yemeni forces, the front lines saw little movement before a 2022 ceasefire.

Following the outbreak of the war in Gaza in 2023, the Houthis began attacking Red Sea shipping. The U.S. and UK initiated strikes against the Houthis in January 2024. Former U.S. President Donald Trump ordered an intensified air campaign early in 2025, dropping thousands of munitions. After weeks of U.S. strikes, the Houthis agreed to cease attacking American ships but continued targeting Israel. Israel responded with its own strikes, killing Houthi leadership and hitting key infrastructure.

After remaining largely on the sidelines for the initial months of the Gaza conflict, the Houthis resumed attacks on Saudi Arabia in July and declared a blockade on Saudi shipping. Air power alone has proven insufficient without ground forces to secure territory, and the ground forces opposing the Houthis in Yemen are deeply fragmented. Diplomatic solutions also appear limited, with the Houthis demanding the lifting of the Saudi blockade, which would represent a significant concession.