The Han Empire: Formation, Reform and Division

The Han Empire was founded after the collapse of the Qin dynasty and ruled from 202 BCE to 220 CE, apart from a brief interruption by the Xin dynasty. Its Western Han court was based at Chang’an, while the restored Eastern Han court ruled from Luoyang. Across these centuries, emperors and officials adapted Qin institutions, worked to bring powerful regional kingdoms under closer central control, and repeatedly faced the costs of warfare, political rivalry and rebellion. By the late second century CE, the emperor remained a symbol of legitimate rule, but regional commanders increasingly held power in practice.

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From Qin’s collapse to Liu Bang’s victory

The Qin dynasty had unified China by conquest in 221 BCE and governed much of its territory through centrally controlled commanderies, administrative districts overseen by officials appointed by the central government. After the death of the First Emperor in 210 BCE, rebellions spread. Among the leaders who challenged Qin authority were Liu Bang, a former county official from Pei, and Xiang Yu, a member of the Chu aristocracy. As Qin rule disintegrated, the two men became rivals for control of the former empire.

Their conflict, known as the Chu–Han Contention, lasted for several years. Liu’s forces defeated Xiang at Gaixia in 202 BCE. Liu then took the imperial title and became known as Emperor Gaozu. The new dynasty inherited a political landscape shaped by Qin unification, but its founder did not rely on direct rule alone. Gaozu first made Luoyang his capital, then moved the court to Chang’an, where surrounding terrain and access to supplies offered advantages for governing and defending the western part of the realm.

Han officials retained elements of the Qin administrative system, including its emphasis on centrally appointed officials and written law. The law code compiled by Gaozu’s chancellor Xiao He appears to have drawn on Qin precedents, despite later Han criticism of Qin’s severity. The early Han government thus combined a central bureaucracy with a looser arrangement in the east, where Gaozu granted kingdoms to leading supporters and members of the imperial Liu family.

Bringing the kingdoms under central control

At first, the empire was divided between commanderies ruled directly from the capital and semi-autonomous kingdoms governed by kings. These kingdoms had their own officials and armed forces, and were expected to provide census information and a share of their revenue to the central government. Their kings could not mobilize troops without permission from the emperor. The arrangement helped Gaozu secure the loyalty of powerful allies, but it also left regional rulers with resources that could be used against the court.

Several kings were suspected of rebellion, and Gaozu replaced most of the original non-Liu rulers with members of his own family. This did not end the threat. After Gaozu’s death, Empress Dowager Lü exercised power through child emperors and appointed members of her clan to important positions. When she died in 180 BCE, court officials removed the Lü family from power and selected Liu Heng, who became Emperor Wen. The episode showed that control of the throne could depend on palace alliances as well as formal succession.

Under Wen and his successor Jing, the court gradually reduced the kingdoms’ independence. The crisis came in 154 BCE, when the king of Wu led six other kingdoms in rebellion. They opposed measures to reduce their territories, which were also intended to limit their political and military strength. Han forces defeated the coalition. In the years that followed, the court further curtailed the kingdoms’ administrations. In 145 BCE, their independent senior officials were abolished, and the central government took greater control over appointments. Emperor Wu later required kings to divide their territories among their male heirs, reducing the size of individual kingdoms over time.

The reigns of Wen and Jing also brought changes to taxation and punishment. The court reduced the tax on agricultural produce, at one point setting it at one-thirtieth of the harvest, and abolished punishments involving mutilation in 167 BCE. These measures formed part of a more restrained approach to government than the one later Han accounts associated with Qin. They did not remove the state’s administrative reach, but helped consolidate rule while limiting some of its demands on households.

Expansion, state policy and the later Western Han

Under Emperor Wu, who ruled from 141 to 87 BCE, the court expanded its military and administrative reach. Relations with the Xiongnu, a powerful confederation of peoples on the northern steppe, shifted from negotiated accommodation to open warfare. The earlier heqin arrangement combined a formal marriage alliance with regular deliveries of goods. Although the agreement treated the Han emperor and the Xiongnu ruler as equals, the Han court made substantial payments in an effort to reduce raids. After a failed attempt to trap a Xiongnu ruler in 133 BCE, Han forces launched major campaigns. They took control of areas including the Ordos and the Hexi Corridor, and established military settlements and commanderies along parts of the frontier. Han influence also extended into other regions, though the degree of control varied.

These campaigns and settlement efforts required soldiers, supplies and revenue. The government took control of salt production and iron manufacturing by 117 BCE and later established a liquor monopoly. Officials also used a system of government grain purchases and sales to limit price fluctuations: the state bought grain when supplies were plentiful and sold it when prices rose. Taxes on households and commercial activity helped fund the government’s growing commitments. Such measures prompted disputes over the proper reach of the state and the burdens placed on producers and merchants.

The court also built institutions that strengthened imperial government. Emperor Wu established an Imperial University in 124 BCE, where students studied the Confucian Five Classics. Learning these texts could help prepare men for official service, though family connections and recommendations also mattered; this was not yet the later examination system in its mature form. Confucian learning gained a stronger official position during Wu’s reign, providing a shared body of texts and ethical principles for officials and the ruling court.

After Wu’s death, regents governed for young emperors, and officials disagreed over the policies he had introduced. Some supported state monopolies and intervention in the economy; others sought lower spending and a more limited role for the government. The monopolies on salt and iron were abolished and restored at different times, and the court curtailed some costly displays. These changes reflected continuing debate about how to fund the state without increasing pressure on households and commerce.

Wang Mang and the Xin interruption

By the late Western Han, the Wang family had gained influence through Empress Wang Zhengjun, whose relatives held senior court offices. Wang Mang became regent and, after the death of the child Emperor Ping, was confirmed as acting emperor in 6 CE. In 9 CE he declared the Han ended and established the Xin dynasty. His claim rested in part on the idea that he was restoring an idealized earlier order, rather than simply continuing Han rule.

Wang attempted sweeping changes. In 9 CE, he renamed land “King’s Fields” and sought to regulate ownership and allotments. He also renamed enslaved people “private dependants” and prohibited their sale. Opposition and disruption led him to relax the restrictions in 12 CE. The policy concerned the status and transfer of land and people; it did not simply free everyone held in slavery. Repeated coinage changes added further difficulties to exchange and taxation.

Flooding of the Yellow River in 11 CE inundated areas of the North China Plain and displaced farming communities. Some displaced people joined bands of rebels, including the Red Eyebrows. Wang’s forces struggled to suppress the uprisings. In 23 CE, rebels entered Chang’an and Wang was killed. A claimant from the Liu imperial family, Liu Xuan, briefly took the throne as the Gengshi Emperor, but his forces were later defeated by the Red Eyebrows. The period between the fall of Xin and the restoration of Han was therefore also marked by conflict among rival claimants and rebel armies.

Restoration and the Eastern Han court

Liu Xiu, a descendant of the Han imperial family who had served under the Gengshi Emperor, declared himself emperor in 25 CE. Known as Emperor Guangwu, he established his court at Luoyang and spent years defeating rival rulers and military leaders. By 36 CE he had brought the main competing territories under Han rule. His restoration depended in part on the support of powerful landowning families, especially in the Central Plain. The Eastern Han court was consequently restored, but it also had to work with local elites whose influence had grown during the upheavals.

Guangwu reintroduced the Western Han’s standard wuzhu coin, whose name referred to a weight of five zhu, in 40 CE and restored titles and ranks that Wang Mang had abolished. Rather than recreating the earlier system of state monopolies on salt and iron, the Eastern Han government relied on taxes and purchases from private producers. Guangwu also allowed households to pay a tax in place of a year of military service, helping the court rely on a volunteer force. These arrangements reflected a changed balance between government needs and private economic activity.

Later Eastern Han emperors continued to respond to agricultural hardship and natural disasters. Emperor Ming repaired dams and canals along the Yellow River and revived a system for buying and selling grain to moderate prices. Emperor Zhang halted some canal work when its demands on local people became too heavy and granted tax relief to families after childbirth. These policies show how the court tried to manage practical problems through public works, tax decisions and grain supplies, though the government’s ability to intervene varied over time.

The restoration did not end competition within the palace. When emperors were young, empress dowagers and their relatives often exercised power on their behalf. Eunuchs, palace officials who had access to the emperor and the inner court, could become political allies in these struggles. In 92 CE, Emperor He relied on eunuchs to overthrow the powerful Dou family. Later emperors and regents also used palace factions to defeat rivals. As child rulers and short reigns recurred, the court’s senior families and eunuchs gained repeated opportunities to shape appointments and succession.

Eastern Han rule also faced serious military and fiscal pressure. A major Qiang rebellion in the northwest lasted from 107 to 118 CE, requiring costly military responses and disrupting Han influence in the Western Regions. The court withdrew forces from parts of that region, while later efforts to restore its presence there were limited and temporary. Repeated relief measures and frontier conflicts strained government resources. Some officials sold offices to raise revenue, a practice that became especially widespread under Emperor Ling and further damaged confidence in the administration.

Rebellion, warlords and the end of Han rule

In 184 CE, Zhang Jue led the Yellow Turban movement, a large religious and political uprising across several provinces. Its followers wore yellow cloth on their heads, and the movement attracted people who sought spiritual healing and a new era of peace. Han forces suppressed the main uprising, but generals who had raised armies to fight it did not necessarily give up those forces afterwards. Their military strength increased the power of regional commanders at the expense of the central court.

After Emperor Ling died in 189 CE, a struggle between the general He Jin and palace eunuchs turned violent. He Jin was killed, and forces led by Yuan Shao attacked the palace and killed many eunuchs. The fighting brought military commanders directly into the capital’s politics. Dong Zhuo took control of the court, deposed the young emperor in favour of his brother, and later moved the imperial court from Luoyang to Chang’an. The emperor eventually returned to Luoyang, but he could not restore the government’s authority over the commanders who controlled the provinces.

In 196 CE, Cao Cao took the emperor from Luoyang to his own headquarters at Xuchang. By holding the emperor, Cao could claim to act in the name of Han while building his own military and political power. Other commanders controlled large regions and pursued their own contests for supremacy. The imperial title continued to carry authority, but the court no longer commanded the empire as a unified state.

In 220 CE, after Cao Cao’s death, his son Cao Pi received the abdication of the last Han emperor and established the state of Cao Wei. Han rule had ended; rival regimes followed, and the division of China became formalized in the Three Kingdoms period.

For the wider setting, see Han China: History, Institutions and Society.