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- June 15 - Licinius issues his own Edict of Toleration, ending persecution of Christians in his own part of the Roman Empire.
- Maxentius reconquers the African provinces from Domitius Alexander.
- Luoyang, the Jin Dynasty (265-420) capital of China, was sacked by groups of barbarians under the leadership of Huns. Jin Huai Di, emperor of China, is captured.
For the band, see 311 (band).