How the Three Kingdoms ended: from rival emperors to Jin

01The map was still changing after Red Cliffs

Red Cliffs in 208 checked Cao Cao’s southern advance, but it did not create three equal states with settled frontiers. Liu Bei subsequently established himself in Yi province, Sun Quan continued consolidating his southeastern base, and the Cao leadership held northern resources and the Han court. The familiar cycle of heroic stories therefore begins before the formal dynastic period.

Separating the late-Han contest from the later kingdoms resolves a common puzzle: both Guandu and Red Cliffs precede 220, the usual opening date of the Three Kingdoms period. They helped create the conditions for new states. They were not wars between three already completed countries called Wei, Shu and Wu.

• Guandu and the struggle over supplies →
• Battle of Red Cliffs (208 CE): who won and why? →

02220, 221 and 229: three distinct imperial claims

In 220, Cao Pi received Emperor Xian’s abdication and founded Wei. In 221, Liu Bei proclaimed himself emperor at Chengdu, retaining the name Han; later writers commonly call his state Shu Han. Sun Quan took the imperial title in 229. Because he had previously been king of Wu and began his own reign era in 222, some chronologies date Wu from 222. That is a different milestone from his imperial accession.

Each regime organized offices, armies and succession while asserting its own legitimacy. Shu Han claimed to continue Han; Wei claimed a transfer of Han authority; Wu established an independent imperial center. The three were competing states, not ordinary provinces within a functioning common government.

03Why did division last for decades?

Geography raised the cost of attack. Mountain routes constrained movement into Shu, while the Yangtze was both a transport artery and a formidable obstacle. Yet terrain alone could not keep a state alive. Defensive positions required troops, provisions and local organization. An expedition’s opportunity had to be weighed against the capacity to sustain it.

Alliances changed too. The Sun–Liu partnership broke down in the struggle over Jingzhou and the war at Yiling, but Wu and Shu later renewed cooperation. Nor did Shu Han disappear when Zhuge Liang died. The history is more than a sequence of famous individuals leaving the stage: governments, supply systems and partnerships continued operating around and beyond them.

04263 and 265: Shu falls, then Wei is replaced

In 263, Wei forces conquered Shu Han and Liu Shan surrendered. By then, the Sima family dominated the Wei government. The conquest increased the resources and prestige available to that leadership, but acquiring Shu and replacing Wei were separate political acts.

In the traditional chronology, Sima Yan replaced Wei in 265 and founded Jin, later called Western Jin, with its political center at Luoyang. Converting the late-year accession into a Western calendar can place the specific event in 266. Neither convention changes the essential point: Wu still existed. The end of Wei was not yet the reunification of the former Three Kingdoms lands.

05280: conquest also meant taking over government

Jin launched a coordinated offensive late in 279. In 280, its forces reached Jianye and Sun Hao surrendered, ending Wu. The operation involved more than one army crossing a river: a fleet descending from the upper Yangtze worked alongside forces advancing on other routes. Wu faced pressure across a wider defensive system.

The Jinshu records not only military success but the acquisition of registers, administrative districts and population, together with arrangements for existing officials. Reunification therefore meant more than crossing a dynastic name off a table. It required taking over local government and managing soldiers, civilians and authority. This conquest is why the Three Kingdoms period is commonly dated 220–280.

06Continue from Luoyang into the age of division

The six dates distinguish three kinds of change. An imperial accession asserted supreme authority; a dynastic replacement changed the ruling house; a conquest altered military control. Wei, Shu and Wu neither began nor ended together. About fifteen years separated Jin’s foundation from its conquest of Wu.

Western Jin’s reunited order subsequently faced struggles within the imperial family, warfare and migration. Stories of the Orchid Pavilion gathering, the Battle of Fei River and Northern Wei’s move to Luoyang belong to the world that followed. They need not feel disconnected: the changing fortunes of capitals, southern political centers and mobile communities provide the connecting threads.

• The Orchid Pavilion gathering →
• The battle of Fei River →
• Xiaowen moves to Luoyang: what changes when a capital moves? →