What's at stake as Yemeni separatists gain ground?
UAE-backed south Yemeni separatists have taken control of vast new areas, rattling the anti-Houthi government and threatening to further divide a country fractured by more than a decade of civil war.
Yemen is already split between the Iran-backed Houthis who control much of the north and a fractious patchwork of anti-rebel groups in the internationally recognised government.