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The final spark was to ban Megara from thading in the Athenian empire, which would ruin it. Megara appelaed to its Peloponnesian allies who gave Athens an ultimatum to lift the ban. Athens refused, and both sides were at war.

There was of course a lead up, where an-over-confident Athens had been intervening in Corcyra and Potidaia, and the Megara standoff was the final straw.

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12y ago

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