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Outbreak of the Peloponnesian War

Type Event Region Greece Time -431

In 431 BCE long-simmering tensions between the Delian League led by Athens and the Peloponnesian League led by Sparta erupted, formally opening the P…

Timeline

  1. -432–-431Corinth · PeloponneseCorinth and other Peloponnesian League states pushed for sanctions against Athens; disputes such as Potidaea and the Megarian Decree sharply worsened relations between the two leagues, and diplomatic mediation failed.
  2. -431Attica · AtticaSparta and its allies declared war on Athens; Peloponnesian forces invaded Attica, while Athens adopted a strategy of scorched earth and naval harassment, and the war entered a prolonged phase of attrition.

Sources