The decade from 230 BC to 221 BC was an important period in Chinese history, as it was during this period that the Qin state unified the six kingdoms and established the Qin dynasty, China's first centralized unified empire. This process was later called the "Spring and Autumn Warring States". After years of war, China's society and economy have been severely damaged.
In order to restore the strength of the country and lay the foundation for future development, Qin Shi Huang began his path of conquest. First he set his sights on the north, which was the territory of the Huns. Ever since Emperor Wu of the Han Dynasty pacified the Xiongnu, they have been a threat to the Central Plains. Therefore, it was very necessary for Qin Shi Huang to solve this problem.
Qin Shi Huang ordered the formation of a powerful army, led by General Meng Tian, to begin the northern expedition against the Xiongnu. After several years of hard work, this army succeeded in driving out most of the Huns and securing the northern border, but also paid a huge price in this battle, with a large number of soldiers killed or wounded.
Qin Shi Huang turned south, and his goal was to occupy the lands of the state of Chu. At this time, the state of Chu was already weakened and unable to resist the powerful offensive of the Qin army. Soon, the state of Chu was destroyed, and its territory was included in the territory of the Qin dynasty.
Through these two wars, the Qin Dynasty successfully expanded its territory and greatly increased its sphere of influence. These victories not only strengthened the political status of the Qin Dynasty, but also laid a solid foundation for later economic development, and this campaign also made people realize the importance of unity and fighting together, which played a positive role in promoting the progress of history.