In early 2015, after months of civil conflict, Houthi rebels took control of the northern part of Yemen, the besieged President Hadi resigned, and the government collapsed. The U.S. embassy closed in February 2015, and its personnel was evacuated. In March 2015, a U.S.-backed, Saudi-led coalition joined forces with Yemen's government to fight the rebels. The conflict was ongoing as of 2021.