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590 CE
600 CE
610 CE
620 CE
590 CE - 628 CE: Reign of Khosrow II (aka Kosrau II).
602 CE - 628 CE: Kosrau II's wars with Byzantine Empire which weakened the Sassanian Empire and led to civil war.
614 CE: Khosrow II conquers Jerusalem.
627 CE: Byzantine emperor Heraclius wins a crushing victory over the Persian army at Nineveh.