The Sui and Tang Dynasties were Chinese Empires that rose and declined due to internal and external forces.
In 581, the Sui Empire was established by the reunification of China by Sui rulers. They reestablished Confucianism as their ideology of the government, but also had a strong influence from Buddhism. This all contributed to their rise, also including their expansion and undertakings, but this even led to their decline. The intense military expansion didn’t have any organization which ultimately caused the Sui’s power to crumble. These undertakings possibly led to their quick decline because there wasn’t that much organization and resources that they could keep to continue. This overextension of land caused the Sui’s decline in 618, less than forty years which was overtaken by the Tang Dynasty.
The Tang Empire was established in 618 by the powerful Li family that ended Sui rule. The Tang rose due to its expansion toward the west with avoiding over centralization, which allowed some officials and religious establishments to practice having some power. During their expansion period there were internal and external rebellions that led to its decline. The Tang was destroyed due to its very own military because they relied on military governors to keep it peaceful, but they just established their own kingdoms. When the military governors’ kingdoms were established they became external threats that were trying to overthrow the Tang Empire, which led to the Tang’s loss of power which caused their Empire’s demise in 907.