Final answer:
The Yellow Turban Rebellion significantly weakened the Han Dynasty, leading to its decline and eventual replacement by the Three Kingdoms period.
Step-by-step explanation:
The dynasty that was greatly weakened by the Yellow Turban Rebellion was the Han Dynasty. This rebellion, which began in 184 CE, was a massive peasant revolt in China and marked a key point in the decline of the Han.
Following the suppression of the Yellow Turban Rebellion, the Han empire was essentially carved up by warlords, leading to its eventual disintegration.
Military commanders who had defeated the insurgents did not disperse their armies but became warlords themselves.
One of them, Cao Cao, eventually deposed the Han monarch and declared his own dynasty.
The era that followed is known as the period of the Three Kingdoms, indicating the end of the Han Dynasty's rule and the division of China into competing regions.