When did the Han overthrow Wang Mang and seize control of China?

The Han dynasty overthrew Wang Mang and regained control of China in 23 AD. Wang Mang had usurped the throne and established the Xin dynasty, but his rule faced widespread discontent and rebellion. The Han forces, under the leadership of Liu Xiu, later known as Emperor Guangwu, defeated Wang Mang's troops, leading to the restoration of the Han dynasty. This marked the beginning of the Eastern Han period.