The Yemeni military announced a broad set of strikes against Houthi targets on Monday, after the government declared a new campaign to retake all territory even as the Iran-backed group made fresh gains on the ground.

The declared offensive sets a lofty goal for the beleaguered Saudi-backed government a month after losing swathes of the country's Red Sea coastline and territory around the Bab al-Mandab Strait, a key chokepoint for international shipping.