He burnt the Persian capital Persepolis to signify the Persian Empire was finished, and the empire was now his.
Matt Damon
Alexander the Great.
The Persian provincial capital of Sardis was burnt be an expeditionary force from the cities of Eretria and Athens, both from outside the Persian Empire, but interfering in the revolt by the Ionian League which was in the empire. This caused Persia to move against them in 480 BCE to prevent such external interference.
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
The Persian Empire absorbed the Baabylonian Empire.
Alexander conquered the Persian Empire.
An empire is an empire, a war is a war.