“... more than 100 million killed in WWII ...”
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I don’t think so.
National WWII statistics from https://www.nationalww2museum.org/students-teachers/student-resources/research-starters/research-starters-worldwide-deaths-world-war
Worldwide Casualties*
Battle Deaths 15,000,000
Battle Wounded 25,000,000
Civilian Deaths 45,000,000
*Worldwide casualty estimates vary widely in several sources. The number of civilian deaths in China alone might well be more than 50,000,000.