1200 BCE: The Median clans are among the Indo-Iranian migrant tribes from Central Asia and/or Caucasus to North Zagros, Iran.

850 BCE: Medes migrate into Iran from Asia.

834 BCE: First Assyrian records of the Medes: Shalmaneser III receives tribute from the "Amadi".

727 BCE - 675 BCE: Medes unite during the reign of their king Dayukku (aka Deioces).

647 BCE - 625 BCE: Phraortes is ruler of the Medes.

647 BCE: Akkadian/Assyrian system of government adopted by the Medes under Phraortes.

625 BCE - 585 BCE: Cyaxares is ruler of the Medes.

625 BCE: Incursions by Babylonians, Elamites, Medes and Scythians weakens the city of Nineveh.

625 BCE - 585 BCE: Median army organized during the reign of Cyaxares of the Medes.

612 BCE: Nineveh is sacked and burned by combined forces of Babylonians and Medes.

612 BCE: The great Assyrian cities of Ashur, Kalhu, and Nineveh are sacked and burned by the Medes, Babylonians, and Persian forces.

585 BCE: The Erebuni fortress in ancient Armenia is occupied by the Median Empire.

585 BCE - 550 BCE: Ishtuvaigu/Astyages expands the Median control over Elam. He finally loses his kingdom to Cyrus II of Persia.

585 BCE: A battle between Media and Lydia broke off immediately as a result of a total eclipse of the sun and the two armies made peace. The eclipse was successfully predicted by Thales of Miletus.

553 BCE: Cyrus the Great successfully rebels against the Medes and establishes the Achaemenid Empire of Persia.