You can inflict mass casualities with convential means, case in point, the Dresden bombing (https://en.wikipedia.org/wiki/Bombing_of_Dresden_in_World_War_II htt

You can inflict mass casualities with convential means, case in point, the Dresden bombing (https://en.wikipedia.org/wiki/Bombing_of_Dresden_in_World_War_II https://en.wikipedia.org/wiki/Bombing_of_Dresden_in_World_Wa...), in the second world war.