How did the Spanish Flu Epidemic affect the first World War?
The Spanish Flu of 1918-19 killed 60 to 100 million people world-wide, it started in the last year of the war and was spread by soldiers returning home from the war. Source below states the epidemic started as a result of a U.S. Army bacteriological warfare weapon that somehow infected U.S. Army soldiers at Camp Riley, Kansas in 1918 and spread across the world. It’s an interesting story. P.S. There was a strange thing about that flu outbreak, it affected mostly healthy young adults, usually, flu outbreaks affect juvenile, elderly, and/or weakened people, most of the people that died from that outbreak were 20 to 40 year old adults, strange.