Title: How do the death rates from WW1 and WW2 compare? - Quora
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WWI soldiers faced:

Content: And from that site: Casualties: WW1: Estimated to be 10 million military dead, 7 million civilian deaths, 21 million wounded, and 7.7 million missing or imprisoned. WW2: Over 60 million people died in World War II. Estimated deaths range from 50-80 million. 38 to 55 million civilians were killed, including 13 to 20 million from war-related disease and famine
The Spanish Flu, estimated to have killed between 50 and 100 million people, and to have infected as many as 500 million (
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WW2 by a lot. This site World War I vs World War II - Difference and Comparison allows you to compare various conflicts. And from that site: