The Iranian-backed Houthi movement in Yemen has recently escalated its involvement in the ongoing regional conflict, marking a significant shift after a period of relatively limited activity in the broader U.S.-Iran confrontation. On Wednesday, the group announced that it had launched missile and drone attacks targeting two Saudi oil tankers in the Red Sea, following its earlier declaration of a naval blockade on vessels linked to Saudi Arabia.

The Houthis, a Shiite militant faction, have been engaged in a prolonged struggle against Yemen’s internationally recognized government for nearly two decades. In 2014, they seized control of the capital city Sanaa, forcing the government to relocate to Aden. The following year, a Saudi-led coalition initiated a bombing campaign aimed at dislodging the militants but ultimately failed, leaving the Houthis in control of much of northern Yemen. The ongoing conflict has resulted in widespread devastation, causing hundreds of thousands of deaths from violence, famine, and disease.

Aligned with Iran’s so-called axis of resistance—which includes groups such as Hamas in Gaza and Hezbollah in Lebanon—the Houthis openly oppose Israel and the United States. Although their clashes with the Saudi-supported Yemeni government had decreased in recent times, a United Nations-brokered cease-fire in 2022 has not brought an end to intermittent hostilities. The group has continued sporadic attacks, and the fallout from the Hamas-led assault on Israel on October 7, 2023, prompted the Houthis to disrupt international shipping lanes by targeting vessels in the Red Sea. The Bab el-Mandeb Strait, located near Yemen’s southwestern coast, is strategically crucial as it connects the Red Sea with the Gulf of Aden and serves as a critical global shipping corridor.

For much of the conflict, the Houthis maintained a cautious, limited role in the wider confrontation involving Iran, the United States, and their respective allies. The movement was reportedly weakened by sustained bombardments from the United States and Israel in Yemen during the previous year, limiting its available resources. This constraint has influenced the group’s strategic calculating regarding operations and engagement.

The recent escalation appears linked to growing tensions following an incident earlier this month, when Houthi officials accused Saudi Arabia of attacking the main international airport in Sanaa in connection with a dispute involving an Iranian aircraft attempting to land there. Analysts also suggest that Iran may have encouraged the Houthis to carry out attacks disrupting shipping traffic in the Red Sea. This move gains further significance given that with the Strait of Hormuz closed for several months, the Red Sea has become a critical alternative route for exporting Saudi oil and gas.

While the Houthis maintain a close ideological and operational alliance with Iran, their relationship is complex. Experts describe the partnership as one marked by both cooperation and restraint, with the Houthis benefiting from Iranian support that has transformed them from a fragmented rebel group into a formidable armed force. However, the movement is not simply a proxy; it strategically balances its ties with Iran against the risks of provoking retaliatory strikes that could endanger its leadership.