Answer:
The Black Death, The Hundred Years' War
Step-by-step explanation:
The Black Death: The Black Death was a devastating pandemic that swept across Europe from 1347 to 1351. It was caused by the bacterium Yersinia pestis, which was transmitted by fleas carried by rats. The disease spread rapidly, killing an estimated 25 million people, or roughly one-third of the population of Europe. The Black Death had a profound impact on European society, causing widespread fear, social unrest, and economic disruption.
The Hundred Years' War: The Hundred Years' War was a series of conflicts between England and France that lasted from 1337 to 1453. The war was fought over a variety of issues, including territorial disputes, dynastic claims to the French throne, and economic rivalry. The war caused widespread devastation in both countries, as armies ravaged the countryside, plundered cities, and engaged in brutal sieges. The conflict also had a lasting impact on European society, contributing to the development of nationalism and the growth of centralized monarchies.