Bangladesh, Sept. 17 -- The latest Houthi missile and drone attacks on Saudi Arabia mark more than another episode in Yemen's long-running conflict. They signal a widening confrontation in which the battlefield is no longer confined to Yemen's borders. With Saudi cities under attack, warnings sounding in Makkah and the strategically vital Bab el-Mandeb Strait increasingly exposed, the consequences now extend well beyond the Arabian Peninsula.

On Monday, Sept. 14, Houthi forces launched ballistic missiles and drones toward Khamis Mushait, Abha and Taif, according to the Saudi-led coalition. The coalition said the attacks injured 13 civilians and damaged seven homes and two vehicles. The attacks followed an earlier wave that Saudi authori...