The war in Yemen has entered a new phase of high-intensity conventional fighting, centered on the strategic highlands of Taiz and Lahj governorates. Government-aligned forces claim to have repelled coordinated Houthi attacks along several fronts on Wednesday night, killing and wounding dozens of fighters in battles for positions on a key road connecting Aden, Lahj, and Taiz. The Houthis have not commented on those specific claims. The stakes are geographic and absolute. The Kahboub Mountains overlook the Bab al-Mandeb strait and Mayyun Island in the Red Sea. Houthi control of these heights would sever the remaining government-held south from the western coast, consolidating gains that already include the port city of Mocha and the Red Sea coastline seized this month. Government forces counter-claimed on Tuesday that they had taken full control of Mount Qarfan, which overlooks valleys linking southern Taiz with the western coast. This ground war is inseparable from the wider regional conflagration. The Houthis, who seized Sanaa in 2014, are Iran-aligned. The government forces are Saudi-backed. The renewed fighting comes amid the US-Israeli war against Iran, which has elevated the Houthis from a local insurgency to a regional actor capable of firing dozens of missiles and drones at Riyadh. Saudi Arabia responded with 52 air strikes across five Yemeni governorates in a single day, with Houthis reporting 988 attacks since the latest escalation began. The humanitarian cost is staggering and accelerating. The WHO reports 674 killed and nearly 3,000 injured since August 6. In the five-day window of September 13-18 alone, 164 died and 516 were injured. More than 158,000 people have been displaced, according to Yemen's Executive Unit for the Management of Displaced Persons Camps. Al Jazeera's Yemen affairs editor Ahmed el Shalfi frames the dynamic bluntly: both sides are locked into a war of attrition. The Houthis are determined to hold Mocha and Bab al-Mandeb; government forces are equally determined to defend highland positions that provide fire control over the coast. Neither side has the capacity to deliver a knockout blow, which means prolonged fighting and mounting civilian casualties. Saudi Civil Defence authorities issued alerts Wednesday warning of potential attacks in Jazan and Najran, two provinces bordering Yemen. The cross-border dimension makes this not just a Yemeni civil war but a live Saudi security problem, with Riyadh simultaneously managing air campaigns in Yemen and missile defense at home. The pattern is extraction layered on extraction: a proxy war between Saudi Arabia and Iran fought on Yemeni soil, with Yemeni civilians bearing the overwhelming cost. Every strategic gain by either side—a mountain, a port, a stretch of coast—translates into more displacement, more casualties, and deeper fragmentation of a country that was already the Arab world's poorest before the war began.
