Which Persian ruler was the son of Darius you and battled the Greeks?

The Persian ruler who was the son of Darius I and battled the Greeks was Xerxes I. He is best known for his invasion of Greece during the Greco-Persian Wars, which included the famous battles of Thermopylae and Salamis. Xerxes aimed to expand the Persian Empire and avenge his father's defeat at the Battle of Marathon. His campaign, while initially aggressive, ultimately ended in failure for the Persians.