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| e. The Second (Great) Peloponnesian War |
| 435 |
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| Corcyra, in northwestern Greece, objected to Corinth's interference with their joint colony, Epidamnus. Corcyra defeated the much more powerful Corinth but, fearing reprisal, called on Athens for help, and the Corinthians backed down. The Athenians then sought to break Corinthian influence over Potidaea, a colony of Corinth but a subject of Athens. | 1 |
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| 432 |
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| Potidaea revolted against Athens, with the tacit support of the Peloponnesian League. Athens then retaliated with the Megarian decree, barring the Megarians from Athenian harbors and markets. Outraged and fearful of further Athenian action, Megara, Corinth, and Aegina pressured a reluctant Sparta to take action. Over King Archidamus's opposition, the ephor Sthenelaïdas convinced the Spartan assembly to declare the Thirty Years' Peace broken. | 2 |
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