The Nanking massacre was conducted by Japanese troops in 1937, over a period of 6 weeks after The Japanese captured the city of Nanking. I am reading about it right now and it's sad that I had never heard about it. 20,000 to 80,000 women were raped during that period and 100,000s people were killed. Forced incest, child rape, mutilation were some of the things accounted by journalists and other people in that city.
It appalls me to think that humans could be that cruel; it almost seems unbelievable. Almost.
I cannot imagine the world in the midst of war again, and yet, because I can't imagine it I think it will happen within a decade or so. Axioms are dangerous. The world has been largely peaceful for a very long time, it should continue being so for many years to come.
I cannot imagine troops of the 21st century being as vengeful as those of yester-years. But humans can surprise.