The period of peace and stability in Asia following the conquest of the Mongols.
Explanation:
The Pax Mongolica, also known as the Mongol Peace, refers to the period of relative peace and stability in Asia following the conquest of the Mongols. The Mongols created an empire that stretched from the Pacific Ocean to Europe. Once an area was conquered, the Mongols required that the people pay tribute to their new rulers, but local customs were allowed to continue.
Personification. The author is treating the river like a person. When an object/animal/thing is talked about like a human being, then it is personification
