Actually, the Mongols should have started the war first. During the three western expeditions and reunification, China War reduced the world population by more than 200 million, and the Mongols killed many enemies in various wars. Hans, the city's capital, promulgated the rule that the surrender city should not be slaughtered, and dared to resist the massacre in the city, causing many innocent victims. Second, Japan's war of aggression against China has created many criminal acts, such as hundreds of people slashing and killing competitions. Third, it was accepted. They want to exterminate the Jews. During World War II, they killed more than 5 million Jews, accounting for more than half of the Jews in Europe at that time. Germany also attacked Jews with Doraemon during the Warsaw Uprising. Germany also killed many foreign prisoners and civilians. Fourth, in the civil war in Rwanda, 800,000 people died in various pictures of massacres, killings and Doraemon.