Yemen has returned to full-scale war. The UN Special Envoy Hans Grundberg said so plainly at the Security Council on Friday, and the numbers confirm it: at least 46 civilians killed since August, 200,000 displaced since September, and Saudi-backed government forces claiming 2,750 precision strikes in a single 24-hour window. The internationally recognised government launched "Operation Dawn of Yemen" on Sunday, announcing its intent to retake all Houthi-held territory including the capital Sanaa. The immediate trigger is the Bab al-Mandeb strait. With the Strait of Hormuz effectively closed by Iranian attacks during the ongoing US-Iran conflict, Saudi Arabia's oil export lifeline now runs through the narrow passage between Yemen and Djibouti. When the Houthis declared a naval blockade of Saudi shipping through Bab al-Mandeb in July and followed it with a ground offensive seizing Mocha, the strategic port city, and Mayyun Island in September, they handed Iran leverage over Riyadh's last viable export route. The Saudi-backed coalition's current offensive is, at its core, a fight to reopen that chokepoint. The Houthis have controlled Sanaa and northwestern Yemen since 2014. A Saudi-led coalition war from 2015 killed between 150,000 and 227,000 people before a UN-brokered truce in 2022 brought relative quiet. That truce shattered in stages: first when Houthis began disrupting Red Sea shipping in 2023 over Israel's war in Gaza, then when they fired missiles at Israel in March 2026, and finally when they imposed the Bab al-Mandeb blockade in July. Each escalation tied Yemen's internal conflict more tightly to the broader US-Iran war. Battles now rage around Mocha and Dubhab on the Red Sea coast. The Houthis have struck back with ballistic missiles and drones, hitting Riyadh's international airport on Friday — killing three Saudi citizens including a pilot, the first such deaths since fighting resumed. Several airlines suspended flights. Coalition forces heavily bombarded Sanaa, striking telecommunications infrastructure, industrial facilities, and military targets. Al Jazeera's correspondent in Sanaa described the bombardment as resembling the 2015 war. The humanitarian cost is already compounding. Yemen has faced famine conditions since 2016, and the UN warns that civilians — especially women and children — are bearing the brunt. The destruction of telecommunications sites and industrial facilities (a chips factory, a sponge factory) signals infrastructure degradation that will outlast any ceasefire. The Houthis warn the campaign risks recreating the 2015-2022 humanitarian catastrophe. The United States has positioned itself as concerned but non-interventionist. Ambassador Jeff Bartos demanded the Houthis stop attacks and Iran cease support, calling the group "instruments of Tehran." But Washington offered no mechanism for enforcement and no engagement with the underlying dynamic: Saudi Arabia needs Bab al-Mandeb open, Iran benefits from it being contested, and the Houthis are the instrument of that contestation. Grundberg urged immediate mediation, but analysts note that government forces' recent gains may make them less willing to negotiate. The structural reality is that Yemen's civil war is no longer separable from the wider regional conflict. Bab al-Mandeb is now a single-point-of-failure for global Red Sea trade and Saudi oil exports simultaneously. Every month this war continues, the infrastructure deficit deepens, civilian displacement grows, and the odds of a negotiated settlement diminish. The 2022 ceasefire held because neither side had an external reason to fight. That condition no longer exists.
