What is the correct chronological order for the following three period?

How many years has it been since 1919? How did Scientific revolution give rise to the Enlightenment? What were the men fighting in the crusades promised? What do historians call the movement of people plants animals and germs? What did the Chinese face while they were moving west? What is the mongol Ascendancy? As Rome expanded what was beset by social and economic troubles were caused by? When did the Bubonic Plague start to exist? What important institutions began in the mid-twelfth century? What was the name of the dynasty ruled by Charlemagne? What cultural similarities were shared by the diverse peoples of the Western Hemisphere in the 1490s and why? How long would a person live in the 12th century ad? Where did the steam engine start and where did it end? How did Muslims unintentionally help the Europeans take over tradewith eastern Asia? In what way can the crusades be called a success? The Great Wall of China stands as an accomplishment of which dynasty? What are the disadvantages of being in the roman army? Why were heraldic shields designed that way? What is the situation of the western front? Name for roman public square in which citizens conducted legal and politcal business?

What is the correct chronological order for the following three period?