Everything in the world must have a cause and an effect, and an effect must have a cause. This is an unbreakable law.
The rise of the Three Kingdoms was due to the decline of the Eastern Han Dynasty. The reasons for the decline of the Eastern Han Dynasty are very special compared with other dynasties.
Since the founding of the country by Emperor Guangwu and the nearly two hundred years of Eastern Han Dynasty, the empire's army has been almost invincible in the world. The surrounding barbarian forces, whether they were Xiongnu, Qiang or Wuhuan, were no match for the Eastern Han Dynasty. The once arrogant Huns were defeated and fled to Central Asia; even in the late Eastern Han Dynasty, the combat effectiveness of the Han army was still unparalleled in the world.
