2. The foundation of the Han Dynasty was originally in the remote Bashu area, which is basically now Sichuan, Shanxi, Henan, Hebei and other places.
After the demise of the Qin Dynasty, Xiang Yu pretended to respect Chu Huaiwang as the righteous emperor, became the overlord of Chu, enfeoffed eighteen ministers, and named Liu Bang as Hanwang.
The battle between Chu and Han, that is, from August of the first year of Han Dynasty (206 BC) to December of the fifth year of Han Dynasty (202 BC), was a large-scale war between Xiang Yu, the overlord of the western Chu Dynasty, and Liu Bang, the Hanwang, for political power, ending with Xiang Yu's defeat and Liu Bang's establishment of the Western Han Dynasty.
Extended data
The influence of war
1, the establishment of the Western Han Dynasty
The dispute between Chu and Han directly evolved from the peasant war at the end of Qin dynasty, but its nature was completely different. Under the social conditions at that time, although the peasant war successfully overthrew the old feudal dynasty, Liu Bang and Xiang Yu, the former leaders of the peasant war, had to take the old road of feudal rule and turned into contenders for feudal sovereignty.
In this competition, Xiang Yu had a strong sense of old nobility, was not good at employing people, and could not rebuild the unified dynasty. Knowing that people are good at their duties and taking advantage of the situation, Liu Bang finally defeated Xiang Yu, ascended the throne of the Western Han Emperor and established the Han Dynasty.
2. Long-term reunification
Xiang Yu enfeoffed Liu Bang in Hanzhong on the Hanshui River and Hanwang in posthumous title. After Wang Han and Liu Bang unified the world, a unified Western Han Dynasty with "Han" as the title was established, which laid the foundation for the later "rule of cultural scene", and Emperor Wu of the Han Dynasty reached the peak of the Western Han Dynasty.
The Chu-Han War created a unified Western Han Dynasty, and Wang Mang entered the Eastern Han Dynasty after a brief usurpation of the country, which formed a long-term unification situation in China's history for more than 400 years and promoted the integration of the Han nationality and economic development.
Baidu Encyclopedia-Chu-Han Debate