Babylon
Cyrus the Great revolted against his suzerain Astyages
Ecbatana (Present-Day Hamadan, Iran)
In 549 BC Cyrus the Great, the Achaemenid king of Persia, revolted against his suzerain Astyages, king of Media, at Ecbatana. Astyages' army betrayed him and Cyrus established himself as ruler of all the Iranic peoples, as well as the pre-Iranian Elamites and Gutians, ending the Median Empire and establishing the Achaemenid Empire.