As a result of the Persian wars of the 5th century BC, Athens took the lead in organizing an alliance of greek city states against further attacks by the Persian empire. According to the study , when the Ionian revolt started Aristagoras supported Athens and Eretria, that’s the reason why the king of Persia vowed to have a revenge against this two. It was Themistocles who supported Athens to continue with their expansion of their Naval Power. Because of his great leadership, he was later on become the leading politician of Athens.