The conquest of Wu by Jin was a military campaign launched by the Jin dynasty against the state of Wu from late 279 to mid 280 at the end of the Three Kingdoms period of China. The campaign, which started in December 279 or January 280, concluded with complete victory for the Jin dynasty on 1 May 280 when the Wu emperor Sun Hao surrendered. After the campaign, the Jin emperor Sima Yan changed the era name of his reign from "Xianning" to "Taikang", hence the campaign has also been referred to as the Taikang campaign.

Wu, known in historiography as Eastern Wu or Sun Wu, was a dynastic state of China and one of the three major states that competed for supremacy over China in the Three Kingdoms period. It previously existed from 220 to 222 as a vassal kingdom nominally under Cao Wei, its rival state, but declared complete independence from Cao Wei in November 222. It was elevated to an empire in May 229 after its founding ruler, Sun Quan, declared himself emperor.