See the link in separate box below: 'Sources and related links'.
550 BCE.
A map of the Persian Empire is in the link in the separate panel Sources and related links below.
Amu Darya.
The Persian Empire.
The Persian Empire was not a person.
Persian Empire
Google: Persian War map.
The Persian Empire absorbed the Babylonian Empire.
Alexander the Great defeated the Persian empire
The Persian Empire absorbed the Baabylonian Empire.
An empire is an empire, a war is a war.
The Persian Empire incorporated the Indus Valley.