disasters

https://www.history.com/topics/world-war-i/1918-flu-pandemic
https://en.wikipedia.org/wiki/Great_Bengal_famine_of_1770
https://worldhistoryproject.org/1887/9/28/yellow-river-flood-of-1887
https://en.wikipedia.org/wiki/1887_Yellow_River_flood
https://en.wikipedia.org/wiki/1556_Shaanxi_earthquake
https://en.wikipedia.org/wiki/1970_Bhola_cyclone
https://en.wikipedia.org/wiki/526_Antioch_earthquake
http://eskify.com/10-worst-natural-disasters-shook-earth/