How long has the war been going on?

Yemen has been troubled by civil wars for decades, but the current conflict intensified in March 2015 when a Saudi-led coalition intervened on behalf of the internationally recognised government against Houthi rebels aligned with the former president Ali Abdullah Saleh.

The war is widely regarded as having turned a poor country into a humanitarian catastrophe. Riyadh expected its air power, backed by regional coalition including the United Arab Emirates, could defeat the Houthi insurgency in a matter of months but instead it has triggered the world's worst humanitarian disaster, with 80% of the population - more than 24 million people - requiring assistance or protection and more than 90,000 dead.





What is the cause of the war?

Its roots lie in the Arab spring. Pro-democracy protesters took to the streets in a bid to force the president, Ali Abdullah Saleh, to end his 33-year rule. He responded with economic concessions but refused to resign.

By March 2011, tensions on the streets of the capital city, Sana’a, resulted in protesters dying at the hands of the military.

Following an internationally brokered deal, there was a transfer of power in November to the vice-president, Abd Rabbu Mansour Hadi, paving the way for elections in February 2012 – in which he was the only candidate to lead a transitional government. Hadi’s attempts at constitutional and budget reforms were rejected by Houthi rebels from the north.

The Houthis captured the capital, forcing Hadi to flee eventually to Riyadh.