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430 BCE
420 BCE
425 BCE: Pylos campaign, under Cleon and Demosthenes' command Athens defeats Sparta at Pylos.
421 BCE: Peace of Nicias, a truce between the Delian and Peloponnesian Leagues.
416 BCE: War breaks out again between rival Sicilian city-states Segesta and Selinus.
415 BCE - 413 BCE: Athenian expedition to attack Syracuse.
413 BCE: The Athenian expedition in Sicily ends in disastrous defeat and the Athenian generals Nicias and Demosthenes are executed.