In the decisive battle of Salamis 480 BCE, the Greek side was commanded by the Spartan admiral Eurybiades.
Themistocles.
Because Persians came to Greece to conquer it and Leonidas and the other Greeks had to defend their country.
Akkadians.
monarchy came first
In the ANE, empire-wise, the Persians.
It is Monarchy
On one side, the Athenian empire, developed from the antiPrtdian Delian League. On the other side, the peloponnesian League led by Sparta, developed to counter the groving power of Athens.
Notably the Persians, Minoans and the Egyptians.
Pisistratus was an Athenian leader who came to power in 560 B.C. He also gave the Aristrocrats land to the poor and helped Athenian trade.
The answer may be unknown. Runners were a standard means of communication at that time. Of course, Phiddipides is the most famous runner because he died after delivering the message that Athens had defeated Persia at Marathon. Perhaps the runner who informed Athens of the Persian approach was him, or perhaps another.Addition:Pheidippides was sent to Sparta to summon them to help repel the Persians. He came back hallucinating and died after the round trip of 120 miles, so was not available to carry any further messages.The Athenians knew all about the Persians coming, particularly after the Persians invested the city of Eretria over on Euboia island a couple of weeks earlier before turning their attention to Athens.The message of the defeat of the Persians at Marathon was carried by the whole Athenian army. When they saw the Persian cavalry embark and head off around the Sunion peninsula, they correctly guessed it was headed for Athens, and that traitors were going to open the city gates for them. So, carrying their weapons and armour, they all ran back over the hills the 26 miles, and formed up in front of the city just as the Persian cavalry disembarked and got ready to gallop up to the city gates.So the messenger was 9,000 Athenian hoplites, led by their general Miltiades. This was the first Marathon run - today's athletes get it pretty easy, don't they?
1) They came to help fight in the World War 1. 2) They came to find employment.
The Athenian economy came to be dependent on trade because a good portion of its terrain was mountainous and rocky, making it unsuitable for the growth of grain. In contrast, Sparta downplayed trade based on its fertile growing environment.
The Persians are the indigenous people of Iran and the descendants of the Aryan invaders who came into the area around 3500 years ago. They did not "choose to settle in Iran", but rather it was where they lived as far back as memory serves.