Origin and development, 9th century – 230 BC According to the
Shiji (), during the 9th century BC,
Feizisaid to be a descendant of the legendary political advisor
Gao Yaowas granted rule over the settlement of Qin (; modern
Qingshui County, Gansu). During the rule of
King Xiao of Zhou, this area became known as the state of Qin. In 897 BC, during the
Gonghe Regency, the area was allocated as a dependency dedicated to raising horses. In the late 8th century BC, one of Feizi's descendants,
Duke Zhuang of Qin, was summoned by the Zhou to take part in a military campaign against the
Western Rong; the effort was successful and Zhuang was rewarded with additional territory. In 770 BC, Zhuang's son
Duke Xiang helped escort the Zhou court under
King Ping in their emergency evacuation from
Fenghao to
Chengzhou under threat from the Western Rongmarking the divide between the
Western and
Eastern Zhou periodisations. As a reward, Duke Xiang was sent as the leader of an expedition against the Western Rong to recapture the territory they had taken, during which he formally established the Qin as a major vassal state, incorporating Fenghao and much of the territory previously under direct Zhou control and thus expanding Qin eastward. The state of Qin began military expeditions into central China in 672 BC, initially refraining from serious incursions due to the threat still posed by neighbouring tribes to their west; by the 4th century BC, they had all either been subdued or conquered, setting the stage for Qin expansionism.
Warring States period, c. 475–230 BC , with the former capital of the Zhou royal family at
Luoyang marked During the
Warring States period (–221 BC), the Qin statesman
Shang Yang introduced a series of advantageous military reforms between 359 BC and his execution in 338. He also helped to construct the Qin capital at
Xianyang (near modern
Xi'an, Shaanxi) on the
Wei River near the former Zhou capital of Fenghao, a city which ultimately resembled the capitals of the other states. The Qin maintained a military that was superior in both doctrine and practice to that of the other Warring States. Its army was large, efficient, and staffed with capable generals. Unlike many of their enemies, the Qin utilised contemporary advancements in weapons technology and transportation, the latter of which enabled greater mobility across the different types of terrain throughout China. The geography of Qin's core territorieslocated at the heart of a region known as the
Guanzhongprovided additional advantages, including fertile farmland, and a strategic position protected by mountains that made it a natural stronghold. The Guanzhong was in contrast with the flat, open
Yangtze valley (also known as the "Guandong") to its south-eastduring this period, Xianyang was the only capital city in China that did not require walls to be built around it. The legacy of Qin society within the Guanzhong inspired a Han-era adage that "Guanzhong produces generals, while Guandong produces ministers." The Qin's agricultural output helped sustain their large army, first expanded by Shang Yang's reforms and irrigation projects, and later via projects like the Wei River canal in 246 BC, said to have been engineered by
Zheng Guo. Qin engaged in practical and ruthless warfare. From the preceding
Spring and Autumn period (), the prevailing philosophy had dictated war as a gentleman's activity; military commanders were instructed to respect what they perceived to be Heaven's laws in battle. For example, during a war
Duke Xiang of Song was waging against Chu, he declined an opportunity to attack Chu forces that were crossing a river. After allowing them to cross and marshal their forces, he was decisively defeated in the ensuing battle. When he was admonished by his advisors for excessive courtesy to the enemy, he retorted, "The sage does not crush the feeble, nor give the order for attack until the enemy have formed their ranks." The Qin disregarded this military tradition, taking advantage of their enemy's weaknesses. A nobleman in the
state of Wei accused Qin of being "avaricious, perverse, eager for profit, and without sincerity. It knows nothing about etiquette, proper relationships, and virtuous conduct, and if there be an opportunity for material gain, it will disregard its relatives as if they were animals." This, combined with strong leadership from long-lived rulers, an openness to employ talented men from other states, and a lack of internal opposition, contributed to the Qin's strong political base.
Unification and expansion, 230–210 BC During the Warring States period, the
seven major states vying for dominance were Qin,
Yan,
Zhao,
Qi,
Chu,
Han, and
Wei. The rulers of these states styled themselves as kings, as opposed to the titles of lower nobility they had previously held. However, none elevated himself to believe that he had the
Mandate of Heaven as claimed by the kings of Zhou, nor that he had the right to offer sacrifices. During the century that preceded the wars of unification, the Qin suffered several setbacks. Shang Yang was executed in 338 BC by
King Huiwen due to a personal grudge harboured from his youth. There was also internal strife over the Qin succession in 307 BC, which decentralised Qin authority somewhat. The Qin was defeated by an alliance of the other states in 295 BC; this was soon followed by another defeat inflicted by Zhao, made possible by a majority of the Qin army already being occupied with defending against attacks by Qi. However, the aggressive became prime minister in 266 BC; after issues with the succession were resolved, Fan pursued an expansionist policy that had its origins in
Jin and Qi, in which they endeavoured to conquer the other states. The Qin first attacked the Han directly to their east, and took their capital city of Xinzheng in 230 BC. They then struck the state of Zhao to their north, who surrendered in 228 BC, followed by the northernmost state of Yan in 226. Next, Qin launched assaults to the east and south; they took the Wei capital of Daliang (modern
Kaifeng) in 225, and forced Chu to surrender in 223. They then deposed the Zhou dynasty's remnants at
Luoyang; finally, they conquered Qi, taking their capital at
Linzi in 221 BC. With the completion of Qin's conquests in 221 BC,
King Zhengwho had acceded to the throne of Qin at age ninebecame the effective ruler of China. The subjugation of the six states was done by King Zheng who had used efficient persuasion and exemplary strategy. He solidified his position as sole ruler with the abdication of his prime minister,
Lü Buwei. The states made by the emperor were assigned to officials dedicated to the task rather than place the burden on people from the royal family. He then combined the titles of the earlier
Three Sovereigns and Five Emperors into the new name "Shi Huangdi", meaning 'First Emperor'. The newly declared emperor ordered all weapons not in the possession of the Qin to be confiscated and melted down. The resulting metal was sufficient to build twelve large ornamental statues at the Qin's newly declared capital at
Xianyang.
Southward expansion, 214–206 BC In 214 BC, Qin Shi Huang secured his boundaries to the north with a fraction (roughly 100,000 men) of his large army, and sent the majority (500,000 men) of his army to
conquer the territory to their south, which was inhabited by the
Baiyue peoples. Prior to Qin's campaigns unifying the former Zhou territories, the Baiyue had gained possession of much of
Sichuan to their southwest. The Qin army was unfamiliar with the jungle terrain, and it was defeated by the southern tribes' guerrilla warfare tactics with over 100,000 men lost. However, in the defeat Qin was successful in building a canal to the south, which they used heavily for supplying and reinforcing their troops during their second attack to the south. Building on these gains, the Qin armies conquered the coastal lands surrounding
Guangzhou, and took the provinces of
Fuzhou and
Guilin. They may have struck as far south as
Hanoi. After these victories in the south, Qin Shi Huang moved over 100,000 prisoners and exiles to colonise the newly conquered area. In terms of extending the boundaries of his empire, Qin Shi Huang was extremely successful in the south.
Campaign against the Xiongnu, 215 BC The Qin collectively referred to the peoples living on their northern border as the
Five Barbarians; while sporadically subject to imperial rule, they remained free from it for the majority of the Qin's existence. Prohibited from engaging in trade with local Qin peasantry, the
Xiongnu inhabiting the
Ordos Desert to the Qin's north-west frequently raided them instead. In retaliation,
a military campaign was led by the Qin general Meng Tian. The region was conquered in 215 BC, and agriculture was established; however, the local peasants were discontented and later revolted.
Collapse and aftermath, 210–202 BC (left). Jing is held by a court physician (background), as a soldier (far right) rushes to save the emperor, who holds an imperial
jade disc. Jing's dagger (centre) has become stuck in a pillar. In total, three assassination attempts were made on Qin Shi Huangone in 227 BC by
Jing Ke, and the other two around 218 BC. Owing in part to these incidents, the emperor became paranoid and obsessed with immortality. While on a trip to the eastern frontiers in 210 BC, Qin Shi Huang died in an attempt to procure an elixir of immortality from
Taoist magicians, who claimed the elixir was stuck on an island guarded by a sea monster. The chief
eunuch,
Zhao Gao, and the prime minister,
Li Si, hid the news of his death upon their return until they were able to alter his will. It is understood that his eldest son
Fusu was intended to inherit the throne; however, Li and Zhao conspired to transmit a fabricated order for Fusu to commit suicide, and instead elevated the former emperor's son Huhai to the throne, taking the name of
Qin Er Shi. They believed that they would be able to manipulate Huhai to their own ends, effectively allowing them to exert control over the empire. As expected, Qin Er Shi proved inept: he executed many ministers and imperial princes, continued massive building projectsone of the most extravagant was the lacquering of the city's wallsenlarged the army, increased taxes, and arrested messengers who delivered bad news. As a result, men from all over China revolted, attacking officials, raising armies, and declaring themselves kings of seized territories. During this time, Li Si and Zhao Gao came into conflict with one another, which culminated in Zhao persuading Qi Er Shi to put Li on trial, where he was ultimately executed. The worsening military situation then caused the emperor to blame Zhao for the rebellion; this pivot frightened Zhao, who engineered another conspiracy to deceive Qin Er Shi into believing hostile forces had arrived at the capital. The emperor's quarters were invaded, and Qin Er Shi was forced to commit suicide for his incompetence after being cornered by Zhao's co-conspirator and son-in-law .
Ziying, a son of Fusu, ascended to the throne, and immediately executed Zhao Gao. Unrest continued to spread among the peoplecaused in large part by regional differences, which had persisted despite Qin's attempts to impose uniformityand many local officials had declared themselves kings. In this climate, Ziying attempted to cling to his throne by declaring himself as merely one king among all the others. He was undermined by his ineptitude, and popular revolt broke out in 209 BC. When Chu rebels under the lieutenant
Liu Bang attacked, a state in such turmoil could not hold for long. Ziying surrendered to Liu Bang upon the latter's arrival in Xianyang in 207 BC; while initially spared by Liu, he was executed shortly thereafter by the Chu leader
Xiang Yu. In 206 BC, Xianyang was destroyed, marking what historians consider to be the end of the imperial Qin dynasty. With the former Qin territories temporarily divided into the
Eighteen Kingdoms, Liu Bang then betrayed Xiang Yu, beginning the
Chu–Han Contention from which he ultimately emerged victorious atop a reunited realmon 28 February 202 BC, he declared himself emperor of the newly founded
Han dynasty. == Culture and society ==