https://en.wikipedia.org/wiki/Civilian_casualty_ratio https://en.wikipedia.org/wiki/Civilian_casualty_ratio is of relevance here. WW1 already had an almost 1:1

https://en.wikipedia.org/wiki/Civilian_casualty_ratio https://en.wikipedia.org/wiki/Civilian_casualty_ratio is of relevance here. WW1 already had an almost 1:1 ratio, though this ratio isn't really indicative of atrocities per se. E.g. previously you might have rather seen pillaging. Going a bit back, the people's crusade of 1096 mostly pillaged European cities and landscape.