Answer: To mark historical moments in are society, so that we can know when they happened hopefully preventing anyone from distorting information.
It was "John O'Sullivan" who <span>entitled the phrase "manifest destiny," since he used this phrase to describe the vision that the US was "destined" to expand all the way to the Pacific Ocean. </span>
B. KANGXI
Perhaps the greatest emperor in Chinese history, Kangxi took charge of the government while still in his teens and reigned for 61 years.
Xuanye was the name of the Kangxi Emperor. He was born in 1654 and his reign as emperor began when he was only 7 years old, from 1661 to 1722. However, his actual rule began when he turned 13 years old.
What illness are you meaning?
They standardized weights, measures, writing and standards