These are the most deadly wars according to msn.com as of 7/6/2020 A.D. The link to my source is here: https://www.msn.com/en-au/news/photos/the-20-deadliest-conflicts-in-human-history/ss-BBC71hG?viewall=true#image=1
Surprising that so many of the deadliest conflicts have been in China. Not sure if you could technically count some of these because they were a series of different battles and wars but overall, great quiz!