Qin dynasty
Government and military

The Qin government was highly bureaucratic, and was administered by a hierarchy of officials, all serving the First Emperor. The Qin put into practice the teachings of Han Feizi, allowing the First Emperor to control all of his territories, including those recently conquered. All aspects of life were standardized, from measurements and language to more practical details, such as the length of chariot axles.

The states made by the emperor were assigned to officials dedicated to the task rather than placing the burden on people from the royal family. Zheng and his advisors also introduced new laws and practices that ended feudalism in China, replacing it with a centralized, bureaucratic government. A supervisory system, the Censorate was introduced to monitor and check the powers of administrators and officials at each level of government. The Qin instituted a permanent system of ranks and rewards, consisting of twenty ranks based on the number of enemies killed in battle or commanding victorious units. Ranks were not hereditary unless a soldier died heroically in battle, whereby the soldier's rank will be inherited by his family. Each rank was assigned a specified number of dwellings, slaves and land, and ranks could be used to remit judicial punishments.

The form of government created by the first emperor and his advisors was used by later dynasties to structure their own government. Under this system, both the military and government thrived, as talented individuals could be more easily identified in the transformed society. Later Chinese dynasties emulated the Qin government for its efficiency, despite its being condemned by Confucian philosophy. There were instances of abuse, however, with one example having been recorded in the "Records of Officialdom". A commander named Hu ordered his men to attack peasants in an attempt to increase the number of "bandits" he had killed; his superiors, likely eager to inflate their records as well, allowed this.

Qin Shi Huang also improved the strong military, despite the fact that it had already undergone extensive reforms. The military used the most advanced weaponry of the time. It was first used mostly in bronze form, but by the third century BC, kingdoms such as Chu and Qin were using iron and/or steel swords. The demand for this metal resulted in improved bellows. The crossbow had been introduced in the fifth century BC and was more powerful and accurate than the composite bows used earlier. It could also be rendered ineffective by removing two pins, which prevented enemies from capturing a working crossbow.

The Qin also used improved methods of transportation and tactics. The state of Zhao had first replaced chariots with cavalry in 307 BC, but the change was swiftly adopted by the other states because cavalry had greater mobility over the terrain of China.

The First Emperor developed plans to fortify his northern border, to protect against nomadic invasions. The result was the initial construction of what later became the Great Wall of China, which was built by joining and strengthening the walls made by the feudal lords, which would be expanded and rebuilt multiple times by later dynasties, also in response to threats from the north. Another project built during Qin Shi Huang's rule was the Terracotta army, intended to protect the emperor after his death. The Terracotta Army was inconspicuous due to its underground location, and was not discovered until 1974.
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