It grew, it tried to defeat the Greek city-states, failed and made peace with them, and was eventually taken over by Macedonia led by Alexander the great.
Persian king Cambyses brought Egypt into the Persian Empire.
The Persian Empire was established and expanded to its greatest area.
Some of the Greek city-states joined with Persia, the southern cities opposed the Persian attempt to absorb them into the Persian empire.
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.
It was taken over by Alexander the Great and so ceased to exist.
The Persian Empire incorporated the Indus Valley.
Alexander conquered the Persian Empire.