Saudi Arabia–Yemen relations

The modern border between Saudi Arabia and Yemen was largely defined by the 1934 Treaty of Taif, which ended a brief border war between Saudi Arabia and the Mutawakkilite Kingdom of Yemen.¹ The treaty ceded the provinces of Asir, Jizan, and Najran to Saudi control, a decision that has remained a source of Yemeni resentment. The border itself was not fully demarcated until the 2000 Treaty of Jeddah, which established a permanent boundary and resolved long-standing disputes over the Empty Quarter region.² However, the border remains porous, with tribal affiliations crossing the line, and smuggling and cross-border raids have been recurring issues. The historical rivalry between the Saudi and Yemeni ruling families, the House of Saud and the Zaydi imamate, also shaped early relations, with Saudi support for various Yemeni factions during the 1962–1970 North Yemen Civil War.

Despite periodic tensions, Saudi Arabia and Yemen have maintained significant economic and social interdependence. Yemen is one of the largest recipients of Saudi aid, with billions of dollars in grants and development assistance flowing since the 1970s.³ Saudi Arabia has also been a major employer of Yemeni workers, with remittances forming a crucial part of Yemen's economy. In the 1990s, however, relations soured when Yemen opposed the international coalition against Iraq in the Gulf War, leading Saudi Arabia to expel nearly 800,000 Yemeni workers. The two countries have also cooperated on security issues, particularly in counterterrorism, but Saudi concerns over Yemen's political instability have often led to interventionist policies, including support for tribal leaders and political factions.

The most defining feature of contemporary Saudi-Yemeni relations is the Saudi-led military intervention that began in March 2015, in response to the Houthi takeover of Sanaa and the ousting of President Abdrabbuh Mansur Hadi.⁴ The coalition, which included the UAE and other Arab states, aimed to restore Hadi's government, but the war has since devolved into a stalemate, with the Houthis controlling much of the north. The intervention has been criticized for causing widespread civilian casualties and a humanitarian catastrophe, including famine and a cholera epidemic.⁵ Saudi Arabia has also faced cross-border missile and drone attacks from Houthi forces, targeting Saudi airports and oil infrastructure. Despite multiple ceasefire attempts, including a UN-brokered truce in 2022, a lasting political settlement remains elusive, and relations remain deeply strained.

Beyond the headlines, several lesser-known dimensions of Saudi-Yemeni relations are notable. The 1934 war was triggered by a border dispute over the Asir region, but it also involved British mediation, reflecting the colonial-era interests in the Red Sea. The 2000 Treaty of Jeddah was notable for its use of satellite imagery and GPS technology, marking one of the first border demarcations to rely on such tools.² In the 1980s, Saudi Arabia secretly supported the Yemeni Socialist Party's opponents, contributing to the eventual unification of North and South Yemen in 1990. More recently, the war has seen the use of Saudi-supplied American-made munitions, which have been documented in civilian areas, raising legal and ethical questions. The conflict has also strained Saudi relations with the Houthi-allied Iran, turning Yemen into a proxy battleground in the broader Saudi-Iranian rivalry.

Houthi movement

A Zaydi Shia political and armed movement that controls much of northern Yemen and has been the main adversary of the Saudi-led coalition.

Treaty of Taif

A 1934 agreement that ended the Saudi-Yemeni border war and ceded Asir, Jizan, and Najran to Saudi Arabia.

Treaty of Jeddah

A 2000 agreement that finalized the border between Saudi Arabia and Yemen, using modern surveying techniques.