A strength of the Persian Empire was that the people were happy. A weakness of the Persian Empire was there were too high of taxes.
At its peak, the estimated population of the Persian Empire was around 50 million people.
The Persian Empire.
The Persian Empire was not a person.
Persian Empire
The Persian Empire absorbed the Babylonian Empire.
Alexander the Great defeated the Persian empire
Land, sea and sky; and people.
The Persian Empire absorbed the Baabylonian Empire.
The successive Persian kings from Cyrus to Darius until conquered by Alexander who turned it into an empire of his own..
The Persian Empire incorporated the Indus Valley.
Alexander conquered the Persian Empire.