Excerpts from Books and Wikipedia
"In the years after Marathon, and in the run-up to the second Persian invasion of 480–479 BC, Themistocles became the most prominent politician in Athens. He continued to advocate for a strong Athenian Navy, and in 483 BC he persuaded the Athenians to build a fleet of 200 triremes; these proved crucial in the forthcoming conflict with Persia. During the second invasion, he effectively commanded the Greek allied navy at the battles of Artemisium and Salamis in 480 BC. Due to his subterfuge, the Allies successfully lured the Persian fleet into the Straits of Salamis, and the decisive Greek victory there was the turning point of the war. . . . After the conflict ended, Themistocles continued his pre-eminence among Athenian politicians. However, he aroused the hostility of Sparta by ordering the re-fortification of Athens, and his perceived arrogance began to alienate him from the Athenians. In 472 or 471 BC, he was ostracised, and went into exile in Argos. . . . He traveled to Asia Minor, where he entered the service of the Persian king Artaxerxes I (reigned 465–424 BC). He was made governor of Magnesia, and lived there for the rest of his life." [Wikipedia]