how did the Han dynasty begin?

Well, in the end of Qin Dynasty, people live miserably since the emperor is incompetent. So there broke out several uprising among the common people. Liu Bang’s team was stronger than the other. So he won the uprising and became the first emperor of Han Dynasty of the nation.

An army was led by Liu Bang and they defeated the emperor which ended the Qin dynasty, continuing on Liu Bang had a four year war with Xiang Yu but again the Emperor defeated Xiang Yu and his army which began the Han Dynasty