The last of the Alcmaeonidae , he played a major role in the second half of the Peloponnesian War as a strategic advisor, military commander, and politician, but subsequently fell from prominence. During the course of the Peloponnesian War, Alcibiades changed his political allegiance several times.
In his native Athens in the early s BC, he advocated an aggressive foreign policy and was a prominent proponent of the Sicilian Expedition. After his political enemies brought charges of sacrilege against him, he fled to Sparta , where he served as a strategic adviser, proposing or supervising several major campaigns against Athens.
However, Alcibiades made powerful enemies in Sparta too, and defected to Persia. There he served as an adviser to the satrap Tissaphernes until Athenian political allies brought about his recall. He served as an Athenian general strategos for several years, but enemies eventually succeeded in exiling him a second time.
Scholars have argued that had the Sicilian expedition been under Alcibiades's command instead of that of Nicias , the expedition might not have met its eventual disastrous fate.
Once restored to his native city, however, he played a crucial role in a string of Athenian victories that eventually brought Sparta to seek a peace with Athens. He favored unconventional tactics, frequently winning cities over by treachery or negotiation rather than by siege. Alcibiades's military and political talents frequently proved valuable to whichever state currently held his allegiance, but his propensity for making powerful enemies ensured that he never remained in one place for long; and, by the end of the war that he had helped to rekindle in the early s, his days of political relevance were a bygone memory.
