The Conquest of Eastern Wu (晋灭吴) in 280 CE was the final campaign of the Three Kingdoms period. The Jin dynasty had replaced Cao Wei in 266 and had conquered Shu Han in 263. Eastern Wu was the last remaining state. Sima Yan (Emperor Wu of Jin) assembled a large army and fleet to cross the Yangtze. Wu’s defences crumbled; Sun Hao surrendered, and Wu was annexed.
End of the Three Kingdoms
The Han had fractured after the Yellow Turban Rebellion; Cao Wei, Shu Han, and Eastern Wu had divided China for decades. The Jin dynasty now ruled a reunified China. The reunification was short-lived: within a generation, the War of the Eight Princes and northern incursions would tear the empire apart again, but 280 marked the formal end of the Three Kingdoms period.