Yemen's Houthis have staged a lightning offensive this month, seizing swathes of territory in one of the world's poorest countries, leaving the internationally recognised government, which is backed by Saudi Arabia, scrambling to respond.

Yemen's Houthis have staged a lightning offensive this month, seizing swathes of territory in one of the world's poorest countries, leaving the internationally recognised government, which is backed by Saudi Arabia, scrambling to respond.

Yemen's Houthis have staged a lightning offensive this month, seizing swathes of territory in one of the world's poorest countries, leaving the internationally recognised government, which is backed by Saudi Arabia, scrambling to respond.