Yemen, one of the Arab world's poorest countries, has been devastated by a war between forces loyal to the internationally-recognised government of President Abdrabbuh Mansour Hadi and those allied to the Houthi rebel movement.
More than 6,800 people have been killed and 35,000 injured since March 2015, the majority in air strikes by a Saudi-led multinational coalition that backs the president.
The conflict and a blockade imposed by the coalition have also triggered a humanitarian disaster, leaving 80% of the population in need of aid.
Factors - leading to civil war
Post civil war - what happened after the civil war
Impacts on civilians
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