| Millennium: | 1st millennium |
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Events and Trends[]
- 627 — The Roman-Persian Wars end.
- 622 — Year one of the Islamic calendar begins, during which the Hijra occurs — Muhammad and his followers emigrate from Mecca to Medina in September.
- 629, The Byzantine-Arab Wars begin. Much of the Roman Empire is conquered by Muslim Arabs led by Khalid ibn al-Walid.
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