Xerxes I fought only one war against the Greeks. His land forces arrived on foot and the naval forces, obviously by sea.
They were leaders the Persian Empire. Darius was the father of Xerxes. Darius led the Persians in the first Persian war, while Xerxes led the Persians in the second Persian war.
Xerxes the great
Darius I led the Persians in the First Persian War. Xerxes I led them in the Second.
Darius I in 490 BC, and his son Xerxes in 480 BC.
Xerxes I.
King Xerxes I led the expedition to Greece in 480-479 which was driven back by the combined forces of the southern Greek city-states.
Persian king Xerxes invaded mainland Greece in 480-479 BCE.
Leonidas was king of Sparta when xerxes led the Persians to attack Greece, leonidas led the famous 300 spartens to meet the Persians and bought the rest of Greece enough time to asemble an army capable of defeating xerxes.
Xerxes I.
Xerxes
Darius
Xerxes (I) the Great of Persia was king during the Second Persian Wars. There was no king of Greece as the region was divided into a series of city-states (some of which had kings -- Sparta, for example, was led by King Leonidas who fought at the battle of Thermopylae, which the movie 300 was based on).