Without googling it and off the top of my head:
Saudi Arabia has been fiercely criticised for launching air strikes which have killed or maimed thousands of civilians. Armed with state-of-the-art US and British warplanes, Saudi Arabia's air force and its allies have complete air superiority in the skies over Yemen. In August 2018 around 40 schoolboys aged six to 11 were killed when a laser-guided bomb hit their bus in the Houthi-controlled north. The UN had verified the deaths of at least 7,500 civilians by September 2019, with most caused by Saudi-led coalition air strikes.
However, monitoring groups believe the death toll is far higher. In October last year, the US-based Armed Conflict Location and Event Data Project (ACLED) said it had recorded more than 100,000 deaths, including 12,0000 civilians killed in direct attacks. More than 23,000 fatalities were reported in 2019. According to the Yemen Data Project, more than 17,500 civilians have been killed and injured since 2015 - with a quarter of all civilians killed in air raids said to be women and children.