During the period of Greek history from the last years of the Persian Wars tillthe beginning of the First Peloponnesian War, the primacy of Sparta declined while Athens was gaining increased influence in Greece. The Athenian, Thucydides(460-400 BC), one among few contemporary historians, left behind the mostcreditable records about this period. Although he did not give enough documentation for many events he described, his Histories remained the main resource of the facts from that time. In consideration of the fact that he was an Athenian and a participant of the Athenian army, future historians could not entirely count upon his writing. In the 480-479 BC there was