Persian Empire
The Persian Empire (Persian: امپراتوری ایران) was a series of historical empires that ruled over the Iranian plateau, the original Persian homeland, and beyond in Western Asia, Central Asia, western South Asia and the Caucasus.
The most widespread entity considered to have been a Persian Empire was the Achaemenid Empire (550–330 BC) under Darius and Xerxes (or Xerkes) — famous in antiquity as the foe of the classical Greek states (See Greco-Persian Wars) — a united Persian kingdom that originated in the region now known as Pars province (Fars province) of Iran.
It was formed under Cyrus the Great, who overthrew the empire of the Medes, and conquered much of the middle east, including the territories of the Babylonians (Asuristan), the Phoenicians, and the Lydians. Cyrus's son, Cambyses, continued Cyrus's conquests by conquering Egypt.