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. The Spartans now saw an opportunity to destroy Themistocles, and implicated him in the alleged treasonous plot of 478 BC of their own general Pausanias. Themistocles thus fled from Greece. Alexander I of Macedon (r. 498–454 BC) temporarily gave him sanctuary at Pydna before 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.