Xerxes I.
Xerxes I.
The first Persian invasion of Greece was during the Persian Wars in 492 BCE. It was ordered by the Persian King Darius I to punish the city-states of Athens and Eretria.
Darius I .
First Persian invasion of Greece happened in -492.
Persia attempted to invade Greece twice during the Greco-Persian Wars. The first invasion was in 490 BC, led by King Darius I, culminating in the Battle of Marathon. The second invasion occurred in 480 BC under King Xerxes I, which included significant battles such as those at Thermopylae and Salamis. Both invasions ultimately failed to subjugate Greece.
The first Persian expedition to mainland Greece in 490 BCE was defeated o land at Marathon. The fleet was not engaged as there was no naval force deployed against it, and evacuated the survivors of the land battle. Athens did not have a viable navy until several years later, when a rich silver strike was used to build a strong navy which provided the backbone of the combined Greek cities' navy which defeated the Persian fleet at Salamis during the second Persian invasion in 480 BCE.
The question is confused. The first king of the Persian empire was Cyrus. The king during the punitive expedition against Athens and Eretria in 490 BCE was Darius. The king during the invasion of Greece 480-479 BCE was Xerxes.
Persia
The Battle of Marathon took place during the first Persian invasion of Greece, circa 490 BC. It was a decisive victory for the Greeks and essentially ended the Persian invasion.
Darius was the third king of the Persian Empire and the father of Xerxes I (the king of Persia mentioned in 300). He was the first Persian to attempt to invade Greece and was ultimately defeated at the Battle of Marathon in 490 BC.
First Sparta, then Thebes, then Macedonia.
Greece. There were two Persian Wars. The First Persian War in 490 BC had only one major battle (Marathon). The Second Persian War in 480-479 BC had three major battles (Thermopylae, Salamis, Plataea). Salamis was a sea battle. The sites can be found on a map of ancient Greece, and possibly even on a map of modern Greece.