 Depiction of Persians and Medians as equals is not consistent with Herodotus' account that the Persians "subjugated" and made "slaves" of the Medes about 20 years before the fall of Babylon ("Histories" 1.129,130).They are consistent with the picture presented in the "Cyropaedia" of a confederation between the two nations, with the Medes initially being the senior partners in the confederacy.Aeschylus' tragedy "The Persians" was written in 472 BC.