The Black Death is widely believed to have been the result of plague, caused by infection with the bacterium Yersinia pestis. Modern genetic analyses indicate that the strain of Y. pestis introduced during the Black Death is ancestral to all extant circulating Y. pestis strains known to cause disease in humans. Hence, the origin of modern plague epidemics lies in the medieval period. Other scientific evidence has indicated that the Black Death may have been viral in origin. (britannica.com)
One of the major ways in which Italian artists used the ideas of the humanist movement in their works is that they focused literally on the human body and mind as opposed to God and the Church--especially in the realm of painting and sculpture.
Yes, because he showed great leadership. He helped the US out during the Great Depression. He was confident, and turned out to be a great, powerful, and respected president.
Mlk used non violent protest, boycotts and petitions
The Mongols could use either a massive army for battles or use smaller groups for ambushes (like guerilla warfare) as the need arose. Also, the Mongols were very well trained in the use of horses and bows. Also, from childhood the Mongols were taught to shoot and ride.