Which was a scientific goal of the Corps of Discovery? 1, to establish an American presence in the West
2, to study the area’s plant and animal life
3, to set up trading posts and forts
4, to keep Europeans out of the region

The Sui Dynasty:

Starting in the year 581 CE in China, the Sui Dynasty was short; nevertheless it accomplished the unification of the southern with the northern part of China.  This Dynasty only had two reigning emperors, Wendi ( Wen-ti) who ruled from 581-601 CE, and then Yangdi (Yang Guang ) who stayed from  604 to 618 CE, year when the Sui Dynasty ceased to exist. It reunified China, expanded the emperors territory, they centralized their system and went through land reforms, which gave small farmers land in order to combat inequality in land that was owned by big landowners and small farmers.

The Tang Dynasty:  

After the collapse of the Sui Dynasty, the Li family gained control of the empire in ruins and founded the Tang Dynasty. This period that goes from 618 to 907, but had an interruption from 690 to 705 CE when the Zhou Dynasty ruled by Wu Zetian, who took over the throne and reintroduced the world to the second Zhou Dynasty. The first emperor was Kao tsu (618-626 CE), afterwards, his son, General Li Shih-min murdered his brothers and forced his father, previous emperor to abdicate the thrown to his son. He preferred his name Tai-tsung, which was his temple name. His plans succeeded and Tai-tsung started his ruling in 626 C.E.

It is said by many historians, that the Tang Dynasty was characterized for being a period of progress and economic stability; it raised the regional military leaders. Also, China´s culture gained strength and is considered the greatest age for Chinese poetry. In conclusion, the Tang Dynasty represented stability and growth for the Chinese and was considered the golden age for the country.  

The Song Dynasty:

This period started in 960 and ended in 1279. It was founded by Emperor Taizu of Song, after having ended both the Five Dynasties and Ten Kingdoms period. During this period, the Song Dynasty was the first in the world to start issuing banknotes and the first government to have a permanent standing navy. The Song Dynasty can be divided into two periods; the Northern and Southern. The first one was from 960-1127 and the second one was from 1127-1279 respectively. The reason for this separation was that from 960-1127, the Song capital was in the city of Bianjing and the Daynasty kept control of the eastern part of China. The Southern period was due when the Jurchen Jin Dynasty took control of the northern half. Time during this Dynasty was filled with life, artworks, development in military strength and stability for the Chinese.