How did the state of Qin fall? When was the state of Qin destroyed?

The Qin Dynasty fell. After the death of Qin Shi Huang, Zhao Gao colluded with Hu Hai and Li Si, forged a testament to establish Hu Hai as emperor, and gave Qin Shi Huang's eldest son Fu Su to die. Qin II Hu Hai was mediocre and did not have Qin Shi Huang's ability to control the resistance forces in various places.

In July of the first year of the Second Dynasty (209 BC), Chen Sheng and Wu Guang were sentenced to death for dereliction of duty, so they took risks and led the soldiers to mutiny, which was huge and responded in various places.

At that time, Zhao Tuo had 500,000 troops in Nanhai County, and the regular Qin army did not go north to rescue, and ordered the troops at the passes of Nanling to convey the instructions of defending against danger to prevent the rebel army in the Central Plains from attacking and set himself up as the king, calling himself "King Wu of Nanyue". Another regular army of Qin was about 300,000 in Shangjun, and for unknown reasons, until the fall of Xianyang, there was no rush to help. In the winter of the second year of Qin II, Chen Shengjun, who was the first to raise troops against Qin, was huge, and Chen Shengbu led Zhou Wen (also known as Zhou Zhang) and others with hundreds of thousands of troops (Hanshu said that it was 100,000) to approach Xianyang, the capital of Qin, and Shi Zhanghan suggested that the second pardon about 200,000 prisoners in Lishan and organize them into an army to fight against Chen Shengjun, and the second appointed Zhang Han as a general to lead this new army to meet the strong enemy.

Zhang Han defeated Zhou Wen and Chen Sheng successively. After Chen Sheng retreated, he was killed by the coachman Zhuang Jia.

Subsequently, the anti-Qin struggle was led by Xiang Ji and Liu Bang respectively, and they entered Guanzhong to attack Qin in the west. In July 208 BC, Li Si was framed by the eunuch Zhao Gao, beheaded in Xianyang, and said to his son before he died: "I want to go out to Cai Dongmen to chase the cunning rabbit with Ruofu Yellow Dog, how can I get it!"

Father and son wept to each other, and then the three tribes were wiped out. In 207 BC, Xiang Yu's 30,000 army broke the 200,000 Qin army, and the main force of the Qin army was annihilated in the first battle of Julu. In September, Zhao Gao killed Qin II, and established Qin II's nephew Ziying as the king of Qin, and Ziying assassinated Zhao Gao as soon as he ascended the throne.

In October 207 BC, Liu Bang entered the customs, and finally the capital Xianyang fell, Ziying surrendered out of the city, and the Qin Dynasty perished.

Therefore, it can be concluded that Xiang Yu was the last living force that annihilated the Qin Dynasty as a resistance, and Liu Bang was the real hero who broke through Xianyang and destroyed the Qin Dynasty.

With the death of Qin Shi Huang and the Great Qin Empire also beginning to fall apart, why would a powerful empire quickly decline?

The state of Qin was destroyed by the Han Dynasty.

In the first year of Qin II, a peasant uprising broke out at the end of Qin, and Liu Bang, the former chief of the Surabaya Pavilion, also raised troops in Pei County in response, called Pei Gong. Later, he joined the anti-Qin rebels of Xiang's uncle and nephew. In October of the second year of Qin II, King Huai of Chu moved the capital to Pengcheng, and Liu Bang, the Duke of Pei, was appointed as the Marquis of Wu'an, served as the magistrate of Dangjun, and led the soldiers of Dangjun.

In 207 BC, Liu Bang led his troops from Pengcheng to attack Xianyang, and the prince of Qin surrendered and Qin died.

After the fall of the Qin Dynasty, in 206 BC, Xiang Yu named Liu Bang as the king of Han, and later Xiang Yu and Liu Bang fought for four years over the acres of Chu and Han. Liu Bang, with the assistance of his subordinates Xiao He, Fan Xu, Han Xin, Zhang Liang, Peng Yue and others, defeated Xiang Xun Piyu in the Battle of Qixia, and officially proclaimed himself emperor in Dingtao in 202 BC, still using the name "Han".

Territory of the State of Qin:

Qin's ancestors were originally Dongyi, and rose in the upper reaches of Weishui and Rong and Di mixed places, and the customs were mostly the same as Rong and Di, and later settled in the middle and lower reaches of the Wei River, engaged in farming, and became a doctor of the Zhou Dynasty. After King Ping moved eastward, he was made a prince and established a state in the Western Zhou Hojing area.

During the Spring and Autumn Period, it is generally regarded as Xirong, after the Zhou royal family moved eastward, the Qin people gradually moved eastward, and after several generations of efforts, by the time of Qin Mugong, finally conquered Guanzhong. After that, until King Huiwen of Qin took Bashu, for nearly 300 years, the territory of Qin State has been roughly stable in the area of present-day Shaanxi Pass and Sale.