Along one of the world's most consequential waterways, a conflict rooted in Yemeni civil war has grown into a threat with global reach. Houthi militias have transformed the Red Sea — a corridor through which roughly twelve percent of global trade flows — into a zone of calculated danger, targeting the pipelines and vessels that carry Saudi Arabia's oil to markets across Europe and Asia. What was once a logistical constant in the architecture of global energy has become a variable, and the world's sensitivity to energy disruption means that instability in these narrow waters is felt far beyond