Chu-Han War, refers to the war between Xiangyu and Liu Bang.

After the collapse of the Qin Empire, the country fell apart again.
A new round of power struggle broke out in 206 BC between two leaders of rebellion army.

One of the rivals was Xiangyu, who was born in an aristocratic family of former Chu State in present Jiangsu Province.
He received martial arts training from childhood and was versed in military matters.
At the end of the Qin Dynasty (221 - 206 BC), he rose up and led his men to defeat the main body of Qin army, proclaimed himself King Of West Chu.

The other was Liu Bang, who was also from present Jiangsu Province.
It was his army who first broke into the Qin capital and abolished all the harsh laws set by the Qin, which helped him win popularity among local people.

However, Liu Bang realized that he was inferior to Xiangyu in military force, and he was jealous of Xiangyu.
He decided to beat a temporary retreat in Hanzhong in Shaanxi Province with the title King of Han authorized by Xiangyu.

Liu Bang fostered his troops secretly in Hanzhong. The tug of war lasted four years.
Due to his blind arrogance and blindness to men of ability, Xiangyu lost the battles at last and committed suicide at Wujiang River.

Liu Bang became the founder of the Han Dynasty (206 BC - 24 AD) in 206 BC, the second empire in imperial history after Qin.