Saudi Arabia has been leading a military coalition in Yemen since 26 March 2015, after the Iranian-backed Houthi group ousted the official government of President Hadi on 21 September 2014.
Yemen 6-year conflict has left more than 100,000 people killed and triggered what the UN calls the world's worst humanitarian crisis.
The war has pushed millions of Yemenis to the brink of famine, as 80% of the population depend on humanitarian assistances.