Since mid-October 2023, Yemen's Houthi militia has carried out repeated attacks on Red Sea maritime commerce, disrupting global trade and prompting the United States and United Kingdom to launch retaliatory airstrikes as well as label the Houthis as a Specially Designated Global Terrorist group. The Iran-backed militia claims it will continue its attacks until the war in Gaza comes to an end. What's really driving the Houthis' escalatory military activity and what does it mean for the future of Red Sea security?