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460 BCE
Athens broke its long-standing alliance with Sparta
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460 BCE
Athens and Argos form an alliance
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460 BCE
Megara enters the Delian League
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460 BCE
Athens begins building the long walls
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Period: 460 BCE to 445 BCE
First Peloponnesian War
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457 BCE
Aegia enters the Delian League
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457 BCE
Battle of Oenoe
Sparta wins -
457 BCE
Athenian victories
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454 BCE
Delian League treasury moves to Athens
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454 BCE
Athens and Sparta sign 5 year treaty