Unit 1 Timeline Alex Johansson By aj10 206 End of Qin Empire B.C.E. 206 Start of Han Empire B.C.E. 220 End of Han Empire C.E. 221 Start of Qin Empire B.C.E. 226 End of Parthian Empire C.E. 250 Start of Parthian Empire B.C.E. 262 Ashoka Promotes Buddhism B.C.E. 312 Constantine issued edict allowing Christianity C.E. 320 Start of Gupta Empire C.E. 323 End of Alexander's Hellenistic Reign B.C.E. 324 Start of Mauryan Empire B.C.E. 334 Start of Alexander's Hellenistic Empire B.C.E. 476 End of Roman Empire C.E. 550 End of Gupta Empire C.E. Jan 1, 1927 Start of the Roman Empire B.C.E. (Supposed to be 27 not 1927) Mar 2, 2022 End od Mauryan Empire B.C.E.