Thucydides was a Greek historian. He was born in 460BC at Athens and died in 399BC. He wrote a history of the Peloponnesian War, a war during which he was in command of an Athenian fleet detailed to protect the coast of Thrace where he owned some gold mines. His failure to prevent Amphipolis from falling to the Spartans, which was blamed on his concern for his own property, led to him being exiled for twenty years.. Research Thucydides