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380 CE
390 CE
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700 CE
387 CE: Roman emperor Theodosius I and Shapur III of Persia agree to formally divide Armenia between the Eastern Roman (Byzantine) Empire and the Sasanian Empire.
410 CE - 490 CE: Life of the Armenian historian Movses Khorenatsi.
428 CE - 652 CE: Persia rules one half of Armenia as the Marzpanate, that is with marzpan viceroys.
439 CE: Mamikonian prince Hamazasp marries Sahakanyush and so unifies the estates of the Mamikonians and descendants of Saint Gregory the Illuminator.
451 CE: Battle of Avarayr between Armenian forces and those of the Sasanian Empire.
484 CE: The Treaty of Nvarsak is signed between Persia and Armenia giving the latter a greater political autonomy and freedom of religious thought.
485 CE: Vahan Mamikonian is made marzpan of Armenia.
554 CE: The Council of Dvin declares the Armenian Church's adherence to the doctrine of monophysitism.
627 CE: Byzantine emperor Heraclius wins a crushing victory over the Persian army at Nineveh.
640 CE - 650 CE: The Rashidun Caliphate conquers Armenia.
651 CE: Arab Rashidun Caliphate conquers the Sasanian Empire.
701 CE: Armenia is formally annexed as a province of the Umayyad Caliphate.