Ansarullah's advance up to 80 kilometers from Aden; The interim capital of the Yemeni government Four military sources told Reuters on Monday that Ansarullah forces had come within 80 kilometers of the city of Aden during their advance. This advance brought Ansarullah's forces to the closest distance from Aden in recent years. Since 2015, Aden has been the main base and temporary capital of the Yemeni government, which is supported by Saudi Arabia.