Athens was part of an alliance of Greek city-states which varied in size from a couple of dozen to 180, led at first by Sparta, then later by Athens after defeat of the Persian invasion.
Persian Empire
The Delian League, which morphed into an empire of Athens.
An expeditionary force from the Persian Empire and the combined armies of Athens and its ally Plataia.
a few of the natural borders of the Persian empire is the middle east, Mesopotamia, Babylonia, Persepolis, etc. another is that he reunited Athens and Sparta, but didn't conquer them.
Sparta
Persian Empire
Persian
The Persian Empire .
Athens turned the Delian League which it had led against the Persian Empire into an empire of its own.
Athens turned the Delian League which it had led against the Persian Empire into an empire of its own.
Athens turned the Delian League which it had led against the Persian Empire into an empire of its own.
Athens converted the Delian League, which it had led against the Persian Empire, into an empire of its own.
Athens, which turned the coalition of city-states it had led against the Persian Empire into an empire of its own.
Athens converted the league it led against the Persian Empire into and empire of its own, mulcting funds by force to support its own lifestyle.
The Delian League, which morphed into an empire of Athens.
It was part of a coalition led by Sparta which repelled an invasion by the Persian Empire.
The Persian Empire versus coalitions of Greek city-states led first by Sparta, then by Athens.