The earth has not changed over that period.
An empire is an empire, a war is a war.
The Achaemenid dynasty ruled the Persian Empire 559-430 BCE, after which it was taken over by the Macedonian King Alexander the Great.
From Libya to Central Europe - the same as the Persian Empire from whom he conquered/stole it.
The Persian Empie at its height was roughly the same size as the continental United States.
Chou dynasty and Persian Empire
He had everyone in the empire use the same money system of weights and measurements.
Yes. The Achaemenid Persian Empire at its height and the 48-States Continental United States are both roughly 8 million square kilometers.
Persia, originally a vassal state of Media, overcame it and the two began the conquests that created the Persian Empire from 550 BCE. This empire stretched from today's Libya through the Mile East to Central Asia and today's Pakistan.
I would say Iran and Greece, since the Persian and Greek empire were the closest to the Roman empire, also there's DNA evidence that proves Persian's, Italian's and Greek's have the same ancestors. They all have the same features as well, so it's very possible.
One dynasty which was around during the time of the Romans was the (247 BC - 224 AD) which ruled the Parthian Empire, the third of the four Persian pre-Islamic empires. Another dynasty was the Sasanian dynasty (224-651) which ruled the Sasanian Empire, the fourth pre-Islamic Persian empire.
The Persian Empire was comprised of 20 provinces ruled by the king and his council. There was no Greek empire until Persia was conquered by a united Greek alliance under Macedonian Hegemony. In Greece, there were over 2,000 independent city-states, each with their own government, who formed loose and changing alliances and shared the same Hellenic culture.
The Persian Empire was a massive empire where peoples under Persian governance had numerous different major religions, such as Zoroastrianism, Judaism, the Hellenic Pantheon, the Levantine Pantheon, the Ancient Egyptian Pantheon, and the Mesopotamian Pantheon. By contrast, all of the Greek city states believed in the same Hellenic Pantheon and so no tolerance of other religions was necessary for societal stability.