The war began as a stalemate. Pericles of Athens knew they couldn't beat Sparta on land, so he pulled everyone behind the Long Walls and relied on the navy. It was a brilliant plan, until nature intervened. A plague struck the overcrowded city, killing a third of the population, including Pericles himself.
While Athens reeled, Sparta found its own hero in Brasidas. He marched through Thrace, capturing Athenian allies and even Amphipolis . When Brasidas and the Athenian commander Cleon both died there, the exhausted sides agreed to the uneasy Peace of Nicias in 421 BCโa pause everyone used to rearm.
Without steady leadership, Athens grew reckless. The charismatic but dangerous Alcibiades convinced them to launch a massive invasion of Sicily. It was a catastrophic gamble. The entire Athenian fleet and army were destroyed in Syracuse โa loss from which they never truly recovered.
The end was slow and agonizing. Sparta, aided by Persian gold, finally built a fleet to challenge Athens. At Aegospotami , they caught the Athenians off guard and destroyed their last ships. Starved into submission, Athens tore down its walls to the sound of Spartan flutes. The Golden Age was over.