Cyrus the Great
Cyrus defeats Astyages and captures the Median capital Ecbatana
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Original prompt & settings (JSON) ↗Astyages marched out to conquer Cyrus — and was delivered to Cyrus by his own soldiers.
A king handed over by his own army
The Nabonidus Chronicle records the reversal in a few damaged lines: Astyages mustered his army and marched against Cyrus, king of Anshan — and his own troops revolted, captured him, and delivered him to Cyrus. Traditional chronology puts the start of Cyrus's revolt in 553 BCE and this defeat around 550 BCE.
The contemporary Babylonian chronicle, not merely later Greek tradition, attributes the decisive reversal to the Median army's revolt. Herodotus's Median noble Harpagus, who organizes a conspiracy and defects to Cyrus, is absent from the Babylonian account.
Ecbatana, and treasure sent south to Anshan
Cyrus then advanced on Ecbatana, the Median royal capital, and transferred its booty to Anshan. He held the captured Astyages prisoner.
Persian supremacy replaced Median kingship, although further consolidation of former Median territories continued afterward — not every territory attributed to a Median empire transferred in a single day's operation.
What the broken tablet cannot say
The familiar chronology reconciles different Babylonian evidence, but the Nabonidus Chronicle's year headings for this passage are broken away. The defeat is conventionally placed in Nabonidus's sixth regnal year because the next preserved entry concerns his seventh; other scholars prefer 554–553, and the defensible range runs 554 to 550 BCE.
Greek narratives disagree sharply about Cyrus's family relationship to Astyages, the number and locations of battles, and the roles of Harpagus and other conspirators. Calling the outcome the instantaneous establishment of the Persian Empire compresses a longer process of conquest and consolidation.
Sources
Researched 23 Aug 2026 5 sources 3 audit passes Date disputed
How this was checked
Researched from the web into a fact sheet, rewritten from that sheet, then audited against it by a different model. How the pipeline works →
Date disputed. Sources disagree; the research places it at ~-0550.
What the sources leave uncertain
- The familiar 553–550 chronology reconciles different Babylonian evidence, but the Nabonidus Chronicle's year headings for this passage are broken away.
- The event is often dated to 550 because the next preserved entry concerns Nabonidus's seventh year; other scholars prefer 554–553 or retain the full 554–550 range.
- Greek narratives disagree sharply about Cyrus's family relationship to Astyages, the number and locations of battles, and the roles of Harpagus and other conspirators.
- Calling the result the instantaneous 'establishment of the Persian Empire' compresses a longer process of conquest and consolidation.