Marathon - it was the Athenians.
The Battle of Marathon was a turning point during the first Persian invasion of Greece. The Persians vastly outnumbered the Greeks on the battlefield, but the Greeks were able to defeat them. The Greeks charged the Persian troops with a thin weaker line, while the Greeks' left and right flanks consisted of stronger troops who quickly surrounded the Persian troops and attacked them on both sides. It was a crushing defeat for the Persians, and the battle convinced the Greeks that while the Persian Empire had vast armies and archers, it was possible to defeat them.
the Persians
They adopted a superior strategy of first defeating the Persian navy, and cutting off their sea supply line. The Persians had to send half their army home for the winter, and the Greeks united the city-state armies to defeat the depleted Persian army.
Salamis.
Greeks could have attacked before the Persians but a lot of the evidence points to the Persians attacking first, the Persians were most likely to have fought when they got off their boats and when they encountered in the valley, but, the Greeks were to have probably ran away into the valley than to have been chased.
Marathon.
A few reasons, First, the Greeks had 7,000 men and the Persians had 15,000 Second, the Greeks fought the Persian Immortals which were histories most elite and powerful warriors. Third, the Persians found a route to outflank the Greeks.
Because the Persians didn't have patience and sent the horsemen in first and the strongest in the boat leaving their weakest variable to Greek attack. The Greeks won even though they were outnumbered, because of the general's mistake of not waiting for the Greeks to come to the Persian forces.
The battle of Marathon 490 BCE.
The Greeks defended, the Persians attacked to get through the pass into southern Greece.
The Athenian and Plataean armies defeat of the Persian expeditionary force convinced other Greek city-states that they could hold off Persian attempts to dominate them.
First define Persian War II. The Persian War ran 499-449 BCE - it had several phases - Ionian Revolt, Persian punitive expedition against Eretria and Athens, Persian invasion of mainland Greece, Greek counter-offensive. Which among this are supposed to be 'Second Persian War', 'Second Persian War' and 'Third Persian War'?