The geopolitical context of the ongoing Iran war shifted dramatically on Wednesday when Saudi Arabia joined the United States in striking Iran-backed militias in Iraq. The move marked the end of five months of restraint, during which Riyadh had gone to considerable lengths to keep itself out of the wider conflict. Until now, Saudi forces had confined their involvement to covert, unacknowledged retaliatory strikes against Iran. That policy of quiet has now been abandoned, and three factors appear to have forced the kingdom's hand: mounting attacks on its energy infrastructure, a punishing blockade of its Red Sea oil exports and the need to restore deterrence before its enemies concluded that Saudi patience had no limit.
The immediate trigger was a burst of drone and missile activity aimed at the kingdom's core infrastructure. In the 72 hours before the strikes, Iraqi militias and Yemen's Houthis together launched more than thirty drones at American forces and Saudi energy sites. On July 27 and 28, Shia militia groups in southern Iraq fired two drone barrages at Saudi oil facilities, with Riyadh itself in range. Over the same period, the Houthis struck two Saudi oil complexes on the Red Sea coast. Satellite imagery and geolocated footage confirmed serious damage to a major facility at Jazan, near the Yemeni border, with a second processing plant hit on July 27.
The precision and scale of the damage would have been hard for Saudi officials to dismiss. It recalled the 2019 attack on the Abqaiq refinery, which briefly knocked out half the kingdom's oil output. Concluding that restraint was no longer sustainable, the Saudi defence ministry approved joint strikes in eastern Iraq intended to destroy the missile and drone capability of the Popular Mobilisation Forces and to remove the Revolutionary Guard advisers directing them.
The threat to Saudi Arabia went beyond damaged refineries. On July 20, the Houthis announced a blockade of Saudi shipping through the Bab-el-Mandeb strait. Riyadh had already worked around the paralysis of the Strait of Hormuz by sending oil overland by pipeline to the Red Sea port of Yanbu, but the new blockade closed off that route, too. To reach Asian markets, tankers loaded at Yanbu still have to pass through Bab-el-Mandeb, which puts roughly 75 per cent of Saudi Red Sea exports within reach of Houthi disruption.
The Houthis left little doubt about their intentions, firing ballistic missiles at Saudi tankers. Matters worsened further with reports that Houthi and Iranian officials had discussed setting up what amounted to a toll on shipping through the strait, controlled from Tehran. For Crown Prince Mohammed bin Salman, the loss of oil revenue also threatened the financing of his Vision 2030 programme, from mega-projects to golf tournaments to tourism development. The strain was already visible in the numbers: Saudi Arabia posted its largest quarterly budget deficit since 2018 in the first quarter of this year, a product of war-related spending and a weakening economy.
Underlying all of these was a calculation about deterrence. For years, MbS had pursued détente with Tehran, culminating in the China-brokered rapprochement of 2023, on the premise that warmer ties offered the most realistic path to regional security. The outbreak of the war in February upended that approach. As the fighting dragged on, Saudi leadership grew concerned that its reluctance to get involved was being read not as caution but as acceptance of repeated attacks on its sovereignty.
By striking in partnership with American forces in Iraq, and doing so publicly, Riyadh was sending a pointed message in several directions at once: that further attacks on the kingdom would carry a real cost. Saudi officials have been careful to frame the strikes as limited and proportionate rather than a step towards all-out war, describing them as an assertion of clear red lines. The action also signalled to Tehran that continued aggression would only push Saudi Arabia further into America's security orbit. Facing pressure from Iran, Iraq and Yemen simultaneously, and conscious that Washington's attention could wane, the kingdom appears to have judged that absorbing further punishment quietly was no longer a viable option.
