 Complete the following phrase:  In the next two decades there would be two Persian invasions of Greece, including some of the most famous battles in history. During the first invasion, Thrace, Macedon and the Aegean islands were added to the Persian Empire, and Eretria was duly destroyed. However, the invasion ended in 490 BC with the decisive Athenian victory at the Battle of Marathon. Between the two invasions, Darius died, and responsibility for the war passed to his son Xerxes I. Xerxes then led the 