Civilian casualties: 26 March marked the fourth anniversary of the entry of the Saudi Arabia / UAE-led coalition into the Yemen conflict. The independent Yemen Data Project (YDP) has tracked 19,553 air raids by coalition forces in that time. It says the air raids have caused at least 17,729 civilian causalities, including 8,345 deaths and 9,399 injuries. These numbers are almost certainly under-estimates as the YDP only uses the most conservative figures in its reporting.