Disaster of Yongjia
The Disaster of Yongjia (simplified Chinese: 永嘉之乱; traditional Chinese: 永嘉之亂) occurred in July 311 CE, when forces of the Han-Zhao dynasty captured and sacked Luoyang, the capital of the Western Jin dynasty. The Han's army committed a massacre of the city's inhabitants, killing the Jin crown prince, a host of ministers, and over 30,000 civilians.