Emperor Wu of Han (156 BC*–March 29, 87 BC), personal name Liu Che, was the sixth emperor of the Chinese Han Dynasty, ruling from 141 BC to 87 BC. A military compaigner, Han China reached its greatest expansion under his reign, spanning from Kyrgyzstan in the west, Northern Korea in the Northeast, to Northern Vietnam in the south. He was best known for his role in expelling the nomadic Xiongnu from the boundary of China. The Han people named themselves after him.
Emperor Wu adopted the principles of Confucianism as the state philosophy and code of ethics for his empire. He started a school to teach future administrators the Confucian classics.
Emperor Wu dispatched his envoy Zhang Qian in 139 BC to seek an alliance with the Yuezhi of modern Uzbekistan. Zhang returned in 123 BC and Emperor Wu then sent many missions per year to Central Asia.
During the end of his reign, his power was severely weakened. Open war broke out between rival families of the Empress Wei and the Li clan. The Li family killed most of Empress Wei's family and forced Empress Wei to commit suicide; during this time, Wu was forced to flee. In the end, Wu was too weak to even name his own successor, who was chosen two days before Wu's death.
* According to some sources, was born on August 27, 156 BC, but most sources do not provide a month and day. All agree on the year.