Who are the Houthis, and why are they so hard to fight?
- Houthis: 96 events in the last 90 days
- Previous: earlier the same day · Giants Brigades lead southern Yemen fightback against the Houthis
What happened
Security correspondent Frank Gardner explains how the Iran-backed Houthis' precision strikes and guerrilla tactics have made it difficult for Saudi forces to gain the upper hand.
Summary assembled by rule from the sources below