How long did it last after Qin Shihuang unified the six countries?

After Qin Shihuang unified the six countries, * * * came to power 12 years. Three years after the death of Qin Shihuang, Qin Ershi, who succeeded to the throne, was killed. Three months later, Liu Bang destroyed Qin.

In 22 1 year BC, Ying Zheng, king of Qin, destroyed the Six Kingdoms, achieved great unification, and claimed to be the first emperor. However, because of Qin Shihuang's cruelty and luxury, Qin became a star, and many uprisings broke out, and the Qin Dynasty also declined. In 2 10 BC, Qin Shihuang died on his way to the east, ending his legendary life.

When the king of Qin succeeded to the throne, the State of Qin had annexed Ba, Shu and Hanzhong, crossed Wancheng in the southwest to Du Ying, and established Nanjun. There are three counties in the north and east of Shang Jun: Hedong, Taiyuan and Shangdang. East to Xingyang. Two weeks after the annexation, Sanchuan County was placed in its hometown. After Qin came to power, Ren, Li Si and others actively pursued the unification strategy.

In the eleventh year of Qin Shihuang, a war broke out between Zhao and Yan. Zhao sent troops to attack Yan, and Qin sent Wang Jian and others to attack Zhao in the name of saving Yan, and successively captured Zhao's Kuihe River, Yiyang (northwest of Nanyang), Hejian (southeast of xian county, Hebei) and Anyang (southeast of Yangyuan County, Hebei). The Zhangshui River Basin has been occupied by Qin.

Extended data:

Before Qin Shihuang unified the six countries, he paid attention to the rule of ethnic minorities in southwest, southeast and northwest regions, thus strengthening the political and cultural ties of a multi-ethnic unified country dominated by the Chinese nation. After reunification, officials were set up in the southwest minority areas, making them a part of Qin State. After the destruction of Chu in the Qin Dynasty, the southeastern Yue nationality region was further unified, and Minzhong County was established in the land of Dong 'ou and Min-Yue.

Subsequently, Qin Shihuang ordered Tu Youyou to lead a 500,000-strong army south in five ways, going deep into today's Hunan, Guangdong, Jiangxi and other places. At the same time, poor people, mothers-in-law and Jia people who were heavily in debt were sent to support the war, and finally South Vietnam and Ou were unified, and Nanhai County, Guilin County and Xiang County were established. Since then, these areas have become the territory of Qin.

In the late Warring States period, there was a powerful nomadic tribe from west to north-Xiongnu, which rose in anger and lived in Toumancheng, north of Yinshan Mountain (now the northern foot of Yinshan Mountain in the northeast of Wuyuan, Inner Mongolia). Its leader, Tou Man Khan, often used fast cavalry to plunder food and people in the Central Plains and burned farmhouses. King Wuling of Zhao therefore took defensive measures and immigrated to reclaim land.

But still can't stop the Huns from going south, and Jiuyuan Henan (referring to the south of the Yellow River) was occupied by them. In the twenty-sixth year of the first emperor (the first 22 years1year), 30,000 households moved to Yuzhong, Hebei Province for reclamation. At the same time, on the basis of the original Great Wall in the north of Qin, Zhao and Yan, a 5,000-mile-long Great Wall was built.